On the Intel side of things, Skylake retired VGA support. Modern UEFI implementations do not universally support BIOS, which means things like https://github.c

On the Intel side of things, Skylake retired VGA support. Modern UEFI implementations do not universally support BIOS, which means things like https://github.com/FlyGoat/csmwrap https://github.com/FlyGoat/csmwrap are required. Also, timing problems are a major reason for the transition to "WinTel" rather than PC-compatible... along with things like 8bit ISA support.