>I'm not doubting you _could_ break up any PR into a shorter one. But that's kind of the point of an expert: they recognise what makes sense to do in reality

I have seen plenty of huge PRs which were more trouble than they were worth to break up after discovery. At some point it becomes like unbaking a cake. It's a trade off.

Ive just never thought when I saw any of them that there wasnt a more practical way to get there with a bunch of smaller PRs.

Unlike dealing with an already existent large PR this isnt really a trade off thing - there are basically almost no circumstances when it is preferable to review one 1000 line code change instead of 4x self contained 200 line changes.