Tbf it was the same story when Windows XP went EoL and by now almost all of those have been replaced. So what's most likely is that Windows 10 will stick around for some time until it silently fades away, just like XP did, regardless of CPU/TPM shenanigans.
As somebody that was using Windows XP up to its EoL, I am fairly certain I was in the minority (at least amongst home users.) I don't think anybody I knew was using XP by the time its end came. The only reason I was still on it at the time was a complete lack of income which meant using very old hand-me-down hardware.
The situation with Windows 10 feels quite different, because most people I know that use Windows are on Windows 10 currently.
I was working at a web design company a little after windows XP went EoL. One site had a member on thier board who kept raising a stink because the redesigned site didn't work right on their computer. Found out that they were using IE6 or whatever on XP. Our estimate for the fix was $600, which was like an additional 2-3% on top of the original estimate so it was approved. The $600 was used to buy a new laptop for that board member with Windows7 and whatever the latest IE was installed.
