I have seen the 13.0 tag of the stack, but I haven't noticed any announcement that it has been released. I'm interested in moving the camera work to 13.0, is that premature? We have some interest in making an upgrade before hopping on the pybind11 update.
Erm, I was sure I'd done it but apparently it was still in draft. Announcement is now out.
(And substantively to your question, yes it is a pre-pybind11 checkpoint).