Physics is like sex: sure, it may give some practical results, but that's not why we do it.
Richard P. Feynman
I think the same is true for a lot of folks and self hosting. Sure, having data in our own hands is great, and yes avoiding vendor lock-in is nice. But at the end of the day, it's nice to have computers seem "fun" again.
At least, that's my perspective.
It's interesting that, with Python, the reference implementation is the implementation
yeah there's Jython but really, Python means both the language and a particular interpreter.
Many compiled languages aren't this way at all
C compilers come from Intel, Microsoft, GNU, LLVM, among others. And even some scripting languages have this diversity
there are multiple JavaScript implementations, for example, and JS is...weird, yes, but afaik can be faster than Python in many cases.
I don't know what my point is exactly, but Python a) is sloooow, and b) doesn't really have competition of interpreters. Which is interesting, at least, to me.