Hey@serhiy-storchaka, would you be willing to review? You fixed the same issue injoinpath() (#64107) almost a decade ago! Thanks.

@barneygale if@serhiy-storchaka doesn't review in a week I will go ahead and merge; feel free to ping me to do it if I forget (I'm also stalling because 3.11.0.rc1 is being cut today and I don't want to have to remember to merge into 3.11 once the branch opens again and then forget). 😅

Wait a moment. This change goes against the initial approach. It can be slower and inconsistent with other pathlib code (the definition of "drive" was different in pathlib and os.path, and can still be different).

Could you give an example where its inconsistent with other parts of pathlib?

It might be slower (I haven't checked) but I don't think pathlib, as ahigh level path library, should care about beating the performance ofos.path for equivalent operations. Comparable performance is fine.

We could de-risk this by skipping backporting. It's a niche bug, and I only need it solved inmain.

To keep things simple I only did this tomain. We can always backport later if we find it necessary.