Apple likely won’t be releasing a 13.0 GM
Think about it. Most of the Beta community is now on 13.1, and they’re still using the same profile as everyone who stuck around on 13.0 beta 8. This means both:
There’s an unusually small amount of people to take advantage of a x.0 GM this year, since they’re either past it or on the stable channel.
Apple can’t offer a 13.0 GM to the people on 13.0 beta 8 without also offering it to the people on 13.1 beta, which they won’t do.
I don’t really know how it’s all going to play out, but I imagine that if Apple is going to release a stable 13.0 to the public, people on the beta will probably have to exit the beta to get any more builds of 13.0.
Of course, there’s always the chance that everyone just gets 13.1 stable instead of 13.0, which would be the clearest way forward. But I have a difficult time picturing 13.1 getting a GM a week from now, or being ready for the public within a few days after that.