To my reading the plaintiffs argument is that users are being forced to upgrade to Win11 or pay $30/year ($61/year for business users) and this presents an undue burden on consumers. As much as I hate to say it, Microsoft looks to have short circuited this claim two days prior to the filing.

From June 24:

Windows 10 support is NOT ending on October 14, 2025, if you’re ready to link your Microsoft account and sync Settings to the cloud. Adding a Microsoft account to Windows 10 will extend support until October 13, 2026. If you don’t want to link a Microsoft account, you can either pay $30 for a local account or use Microsoft Rewards 1,000 points.

source

So MS is saying that as long as you’re not using a local account, you don’t have to pay for extended support for Win10. Only if you want to keep your local account do you need to pay $30/year (as a non-business user).