@Corrine,
Unsurprisingly, we have some members of the tech community arguing, some pretty vociferously, that Microsoft can't be serious about not updating Windows 11 on unsupported hardware if they allowed the installation in the first place.
Memories of "variances" that Microsoft has allowed in the past, and how they were allowed, become misty. But just the fact that the only way to install Windows 11 on unsupported hardware is via completely clean install is a huge shift in usual practice since the era of Windows As A Service began. That was the first indicator, to me, that they are serious about cutting off updates once "the Windows 11 shake out period" is over. The watermark is the second. I suspect there will be one more, and one that will be "big and bold," before the cut-off actually occurs.
But people are going to do what they want to; they always do. And the chips will fall where they may; they always do.