I feel like I already articulated why I think Rust is not the best choice for most of what we do and you ignored it in order to write a snide response. Can we please keep HN from devolving into Twitter?
You didn't clarify what your existing stack/tooling is (other than it being based around a GC language), so it's kinda hard to give more detailed feedback. (In general, though, Rust tries its best to make GC-less development as productive as programming in ordinary GC languages, by generalizing the C++ 'RAII' pattern. Wrt. ecosystem concerns, Rust can interoperate with many existing languages though of course some will be harder than others, and interop with GC languages is quite challenging in general.)
> Rust tries its best to make GC-less development as productive as programming in ordinary GC languages
I think it is generally impossible. While first draft version of the program may have similar velocity, later maintaining will necessarily hit those leaked lower level detail which is simply not a problem with managed languages.
But I don’t think that this is a problem in any way or shape.