Python

I think for python tooling the choice is Python Vs Rust. C isn’t in the mix either.

That seems fair. Though I recall Mumba making headway (at least in the anaconda / conda space) and it is a C++ project. AFAIU, their underlying internals have now been folded into conda, which would mean a fairly popular, and arguably successful portion of the tooling ecosystem (I tended to reach for conda and recommend the same to many) is reliant on a C++ foundation.

On the whole, I imagine this is a good thing as the biggest issue Conda had was performance when trying to resolve packaging environments and versions.

So, including C++ as part of C (which is probably fair for the purposes of this discussion), I don't think C is out of the mix either. Should there ever be a push to fold something into core python, using C would probably come back into the picture too.

I think there’s a survivor bias going on here.

Your survivorship bias point on rust makes a lot of sense ... there's certainly some push back against its evangelists and that's fair (as someone who's learnt the language a bit). Though I think it's fair to point out the success stories are "survivorship" stories worth noting.

But it seems we probably come back to whether fundamental tooling should be done in python or a more performant stack. And I think we just disagree here. I want the tooling to "just work" and work well and personally don't hold nearly as much interest in being able to contribute to it as I do any other python project. If that can be done in python, all the better, but I'm personally not convinced (my experience with conda, while it was a pure python project, is informative for me here)

Personally I think python should have paid more attention to both built-in tooling (again, I think it's important to point out how much of this is simply Guido's "I don't want to do that" that probably wouldn't be tolerated these days) and built-in options for more performance (by maybe taking pypy and JIT-ing more seriously).

Maybe the GIL-less work and more performant python tricks coming down the line will make your argument more compelling to people like me.

(Thanks very much for the chat BTW, I personally appreciate your perspective as much as I'm arguing with you)