Meta could lose more than a trillion dollars because a federal court might order it to delete infinite scroll. The number is so large it stops the sentence. It is not a fine for a data leak. It is not a penalty for a single breach. It is the price tag on a design choice that billions of people touch every day without thinking.

The trial now underway in Oakland asks whether Facebook and Instagram were built to hook children. Four states filed the case. Dozens more have joined. They say Meta knew its platforms could harm young users and kept selling them anyway. The states want money. They also want change. They want the court to force Meta to remove features like algorithm-driven feeds, autoplaying videos, and infinite scrolling. A ruling that obligates Meta to eliminate such features could beget industry-wide redesign and, according to one analyst, “the end of social media as we know it.”

Why this story now? The trial opened in mid-August. Opening statements laid out the claim in plain words. California’s deputy attorney general told the court that Meta chose profit over safety, hid the reality of under-13s on its platforms, and ran a business model to hook users, hold them, harvest their data, and hide the truth. That is a sharp sentence. It lands because it names a pattern many parents already feel.

Who benefits from this framing? The states gain a chance to show they are acting on child safety. Lawyers for the plaintiffs gain a clear target: features that keep eyes on screens. Parents gain a vocabulary for a worry that has lived in the background of family life for years. Meta gains a chance to say the number is wrong and the claim is too broad. The company has warned that potential damages could reach approximately $1.4 trillion, though state attorneys have reportedly described roughly $200 billion as a more realistic figure.

What would the story look like if the opposite were true? If the court finds that these features are not harmful by design, the narrative shifts. The trial becomes a warning about overreach. The trillion-dollar figure becomes a scare tactic. The call to strip away infinite scroll and autoplay looks like a bid to control how adults use their own time. The states would still win some ground on data rules. But the core claim, that the platforms were engineered to addict children, would lose its force.

The features under scrutiny are not minor. They are the spine of the feed. Infinite scroll removes the natural stop sign at the bottom of a page. Autoplay removes the choice to click. Algorithm-driven feeds remove the order of time and replace it with a guess about what will keep you watching. Instagram Stories add a vanishing act that makes you check back before the content disappears. Beauty filters change how a face looks on screen and, critics say, push young users toward comparison and shame.

If a judge orders these features gone for users under 18, the change would ripple. Meta would have to build new rails into Facebook and Instagram. Other platforms would watch. TikTok, Snapchat, and YouTube would face the same questions. A Los Angeles jury already found Meta negligent in a related case, ruling that addictive design caused youth mental health harms. That verdict does not bind this federal trial. But it sets a tone.

Why does the trillion-dollar number matter if the states say a lower figure is more realistic? Because it frames the risk. A $200 billion settlement would still be historic. It would dwarf past tobacco and opioid deals. A $1.4 trillion exposure would approach Meta’s total market value. The gap between the two numbers tells you how far apart the sides stand. It also tells you how much is at stake for every user who opens an app and starts to scroll.

What changes if the court sides with the states? Daily usage limits could appear for teenagers. Nighttime blocks could shut off access during school hours and late at night. Age checks could become stricter. Parents could get dashboards that show how long their teens spend in the app. Meta could be required to prevent children from creating multiple accounts to evade controls and to delete data collected from users under 13. The company has already said a settlement agreement includes a payment of approximately $18 billion, to be distributed in annual installments over a 10-year period, funding youth online safety initiatives as deemed by the states.

Who pays? Meta pays the bill. But the cost may pass through. Advertisers could see higher prices. Creators could see lower reach. Users could see more friction. A feed that stops scrolling is a feed that asks you to choose to continue. That choice may lower time on app. It may also lower the value of each ad slot. If the business model shifts, the incentives shift with it.

Why now, and not five years ago? The evidence base has grown. Internal research has leaked. State attorneys general have coordinated. Public concern has moved from vague worry to specific blame. The legal tools exist to target design, not just content. The trial is not about what minors saw on their feeds. It is about how the feed was built to keep them there.

What if the redesign goes too far? Adults use these platforms too. A rule meant to protect children could change the experience for everyone. A feed without autoplay is slower. A feed without infinite scroll is shorter. A feed without algorithmic ranking is harder to navigate. Some users will welcome that. Others will feel the loss. The question is not whether change is needed. The question is who decides the shape of that change and how much of it applies to all.

The stakes are clear. A ruling that forces Meta to strip away core features could reshape social media for billions. The trial will test whether those features are tools of harm or tools of engagement. It will test whether a company can be held liable for the way its product keeps attention. It will test whether a trillion-dollar threat is a real risk or a bargaining chip.

The answer will not come in a day. The trial will run for weeks. Evidence will stack up. Witnesses will speak. Lawyers will argue. The judge will weigh the claims. The outcome could alter the digital landscape and user experiences in ways that touch every person who opens an app and starts to scroll.