Yes, but why would you want the BIOS boot assuming you have a motherboard made in last 10 years and it has a UEFI implementation which isn't completely broken.

Yes, but why would you want the BIOS boot assuming you have a motherboard made in last 10 years and it has a UEFI implementation which isn't completely broken. I might understand doing that just in case when preparing a bootable flash drive. Why complicate things for permanent installations where you know your current hardware and your next system after 5 years is unlikely to much worse than current one?