In the startup world, BYOD is/was exceedingly common. All but two jobs of my career were happy to allow me to use my own Linux laptop and eschew whatever they were otherwise going to give me.

Obviously enterprises aren’t commonly BYOD shops, but SMBs and startups certainly can be.

… whether the people who would do such BYOD things are at all likely to be Windows users who care about this Bitlocker issue, is a different debate entirely.

Then the founders do something really stupid, and the law decides that your equipment may be evidence.

Unless you're a founder, you should always use company provided equipment.