mypy and pyright have been out for so long, and they're in a pretty usable state. Ignoring to use them leads to buggy code that shows its ugly head as unhandled

mypy and pyright have been out for so long, and they're in a pretty usable state. Ignoring to use them leads to buggy code that shows its ugly head as unhandled rare conditions begin to manifest themselves. The compounding effects of these unhandled rare conditions ultimately ends the project when the lead subject matter expert exits the team.