Unfortunately python does add features in a drip-drip kind of way that makes being behind an experience with a lot of niggles. This is particularly the case for the type annotation system, which is retrofit to a language that obviously didn't have one originally. So it's being added slowly in a very conservative way, and there are a lot of limitations and pain points that are gradually being improved (or at least progressed on). The upcoming lazy module loading will also immediately become a sticking point.