> Adding types post-hoc has never improved a codebase that I've seen but it has caused a lot more bad patterns to show up. I mostly meant that I do all my gree

> Adding types post-hoc has never improved a codebase that I've seen but it has caused a lot more bad patterns to show up. I mostly meant that I do all my greenfield JS dev using TypeScript. Out of curiosity, what bad patterns have you seen caused by adding types “post-hoc”?