As someone who’s built his own PCs for years, I’ve never really bothered with a BIOS update.
Then again, one of the main reasons to update BIOS is to gain support for new CPUs, but I’ve been using Intel which switches to a new socket or chipset every other generation anyway. I’ve almost always had to buy a new motherboard alongside a new CPU.
This is the whole idea behind Turing-completeness, isn’t it? Any Turing-complete architecture can simulate any other.
Reminds me of https://xkcd.com/505/