> and it's the kind of readability refactor that you'd often want to do anyway even if the code wasn't being shared.

Couldn't disagree more tbh. Some of the worst code I've ever had to work with has been over abstracted "recipe" code where I'm trying to descern complex processes based off two word descriptions of them in function names.

Doing this too much is a great way to turn a readable 100 line algorithm into a 250 line clusterfuck spread across 16 files.