> Development time is absurdly faster, though, since you don't spend much time debugging annoying language-design bugs, and can focus entirely in your code's logic.

I don't mean to be dismissive, but if this was really true we'd all be writing TLA+ specifications/Coq proofs before finalizing our Ada SPARK implementations. In reality, static analysis only improves development time if time_lost_to_debugging > time_lost_to_arm_wrestling_compiler, and in my experience that's not always as common as one would like to believe.