BSD is mainstream.

If you really want 1:1 hacker-to-user ratio you'd need to go to Haiku.

Is it? From my perspective BSD is to Linux what Linux is to Windows. Making it a fraction of a fraction in terms of desktop market share.

That too can be swayed if you define it realistically. The modern Playstation operating system is based on FreeBSD, which isn't entirely pure but feels like fair game considering the BSD license.

Fair point. But if we're going to include that we have to include Android in the Linux camp. Which is gonna dumpster the Linux ratio.

Android uses OpenBSDs libc, though. Unless it's changed in the last 10 years.

Interesting, I didn't know that. I just assumed it would be based on glibc.

I would argue that in this case though the kernel is more relavent. So I'd still say Android is Linux based.