Just to add to siblings, I'd propose a rule of thumb of at most 2 sentences per "page" of code, where a page is about as much code is on your screen at a readab

Just to add to siblings, I'd propose a rule of thumb of at most 2 sentences per "page" of code, where a page is about as much code is on your screen at a readable size. It's a rule of thumb, and snark will put you over that easily, but IME, it can suggest you're getting overzealous about commenting when you've got more than that.