The majority of x86 computers I have are BIOS only, only one of them is UEFI and I only have it because I found it discarded on the side of the road. I don't use the UEFI mode though, since my current install doesn't support booting in UEFI mode (no GPT) and wouldn't support booting in BIOS mode if I switched it to GPT and UEFI.
