Typescript's structural typing plus the "any" escape hatch feels like a pretty good sweet spot to me. 99% of my Typescript code is very strict and I rarely make

Typescript's structural typing plus the "any" escape hatch feels like a pretty good sweet spot to me. 99% of my Typescript code is very strict and I rarely make use of any but it's sometimes nice to have. Writing correct, maintainable software is hard. You need both tests and typechecking.