If you're in a legacy to base, or even a maintained co base that doesn't have a whole lot of typing in it, thir's all lternaties you can have. You pick s some fantastic tooling, like munsy type, which can annotate your code base for you. Look through your bug reports and f what would we have caught? Oh, how much faster could we go? There's also ametior value to it. Sometimes data speaks vo som i you're having a touh time convincing people.