1. Interesting that they did not have this as part of an event. I think this either means they do not have much else to share around the Mac right now or the opposite, there just won't be room to talk about the iMac or Mac Mini. I am leaning towards the former as a I suspect the other computers in their lineup will just receive a spec bump soon.
2. On the product page (https://www.apple.com/mac-mini/) Apple highlights a number of third party accessories. Notably the PS5 controller and several keyboards and mice from different manufacturers. This seems small, but it would have been almost blasphemy under the jobs era.
3. This is quite the little powerhouse. Honestly it is so good it eliminates the need for most people to even consider the Mac Studio.