This is just my 2 cents as a PyPy user. CPython eagerly destroys unreferenced
objects while PyPy will destroy them eventually. I ran into a problem with the
requests library where it would create connection pool object every request,
and the unreferenced pool would not be cleaned up immediately
We've got a library that supports py 3.8 .. 3.12
I though I'd give it a go with newest pypy release, and a couple of unit
tests fail.
I've traced it down to the expectation that objects will disappear from
weakref.WeakKeyDictionary.
In some cases, this is a user-facing thing, we issue a warning fo
