[novok]

I've found the transition point where types are useful to start even within a few hundred lines of code, and I've found types are not that restrictive if at all, especially if the language started out typed. The rare case I need to discard types that is available usually, and a code smell your doing something wrong.

Even within a recent toy 1h python interview question having types would've saved me some issues and caught an error that wasn't obvious. Probably would've saved 10m in the interview.

[whizzter]

Yep, depends on your memory context capacity.

For me I often don't feel any pain-points when working before about 1kloc (when doing JS), however if a project is above 500loc it's often a tad painful to resume it months later when I've started to forget why I used certain data-structures that aren't directly visible (adding types at that point is usually the best choice since it gives a refresher of the code at the same time as doing a soundness check).

[pydry]

The transition to where type hints become valuable or even necessary isnt about how many lines of code you have it is about how much you rely upon their correctness.

Type strictness also isnt binary. A program with lots of dicts that should be classes doesnt get much safer just because you wrote : dict[str, dict] everywhere.