What was needed for W11 support? The on-chip TPM support? or does the kernel used one of the newer x86 ISA additions and instructions? [I'm a compiler developer so I keep up with these things] Given that people are running W11 on these "older" systems using rufus or something else, I don't think they are building the EXE file with the additional instructions. There might be errata on older chips that could open up exploitations they have no OS-level workaround. However, I've never seen such a list [and I doubt that would be public knowledge]
