Yes, but you could still buy a new motherboard without UEFI support a year ago, and there are still some units in stock online.
It’s way, way too early to drop support of an OS that is the latest version that can be run on hardware that current.
People who spent 3 grand building a computer in 2021 should be able to have OS support for at least a decade. They can’t upgrade their OS, so the latest OS they could purchase should be maintained longer.
Alternatively, this is perhaps the only way for Microsoft to pressure hardware makers to stop shipping BIOS motherboards. They won’t naturally go away unless there’s an incentive.
They absolutely should push manufacturers to stop using non-UEFI boards. And they should do that by not offering an OS for sale that is compatible with the older tech.
But they also need to support the customers who purchased Windows 10 near the end of its lifecycle without knowing that future upgrades would be impossible. Microsoft is forcing users with relatively new computers to replace them.
