Rust has many high-level constructs available as well as libraries ready and available if you stick to "python-like" things. Saving a "few keystrokes" is not what I described, it was specific: `: Dictionary[int, str]`, this is hard to remember, write, and read, and there's lots of punctuation. Many defs are even harder to compose.

Cementing that in early on is a big pre-optimization (ie waste) when it has a large likelyhood of being deleted. Refactors are not large at this point, and changes trivial to fix.