I guess both JavaScript and Python reinvented themselves through gradual typing. It makes Python quite a different language and JavaScript literally a different

I guess both JavaScript and Python reinvented themselves through gradual typing. It makes Python quite a different language and JavaScript literally a different language. My most recent small (1k LoC) Python project is “fully typed” and therefore practically type safe (not strictly speaking though). Lots of the large libraries are typed as well, which is important. For Python, work around the GIL might be the next evolutionary step, that time in the name of performance.