[joshuamorton]

I expect in this context, expressiveness means something like "the ability to describe the relevant stuff in the code with minimal noise", which might map to having good abstraction.

I find that pythons OOP + functional aspects, combined with a good understanding of the language hits a sweet spot here. One that simply can't be reached in c/cpp/go/java/haskell, and which is much easier to reach than in js/rust/other langs where I think it is possible.