Idea to make the FW16 more modular by adding Compatibility Support Module for it’s bios. I have no knowledge on how bios works, but having a legacy mode in the new FW16 bios will open more room for old media platforms.
An operating system that hasn’t been updated to support UEFI natively is not likely to be a clear winner on modern hardware.
What use case are you hoping to light up? Is there really no other option than resurrecting something that should have stayed back in the aughts?
I’d personally prefer the Framework Laptop to remain as legacy-free as possible.