And according to https://pyreadiness.org/3.12/ nearly twice as many of the top 360 packages are ready for 3.12 than were on release day for 3.11 or 3.10.
It's likely most will work for 3.12, thanks to everyone who tested early.
2023-10-02:
68 packages (18.9%) support Python 3.12
2022-10-24:
39 packages (10.8%) support Python 3.11
2021-10-04:
38 packages (10.6%) support Python 3.10