Apparently there is a way to make Windows Xi run on a legacy BIOS PC. It involves creating a special registry key called LabConfig and fudging the ISO image.
https://allthings.how/how-to-install...ot-or-tpm-2-0/
I've not tried it and wonder if MicroS~1 will patch that capability out.
UEFI is here to stay. A big debate in Fedora about maintaining backwards compatibility for old hardware with the infamous Lennart (creator of systemd) pushing his own not-backwards compatible boot loader into Fedora. Even though UEFI supports UEFI-MBR to boot your old disks you still require hardware that can actually load EUFI firmware. The lively debate continues in Fedora.
Why throw a perfectly good old computer in the bin? Perhaps I should write a stern letter to Greta.