Also, why are you so focused with corporate decision of a distro that is obviously cattered for future devices?
This hardware is not just usable, it is _perfectly usable_, up to the point you'd barely distinguish it Gnome-performance-wise from something from last year if you pair with an SSD (which is not so strange).
This is not a 486 with 4megs of RAM that requires a special DE. These are machines with many gigs of RAM that have graphic cards which are still better than some of today's low-end cards. If any change like this is ever accepted, drawing the support line at "10 year old hardware", it's going to be hard to ever again claim that Linux is good for the environment.
If someone is heavily invested into RH for their BIOS only infra, this could be an issue for them. I'm sure there's large operations that would need fixing up if these change happens.
Not that RH is obligated to cater fully to that crowed of course. But 10 years is a bit silly, especially with how expensive hardware is now due to covid.
All that said, it's not going to be an issue like everyone is making it out to be.
Individuals should have few problems forking mainline to keep BIOS support, and large organizations will be given amble time to upgrade (at least years. RH isn't stupid with it's corporate customers.)