I get a lot of "what camera should I buy," emails and instead of spending an hour replying with all the details someone needs to make this decision, I thought I would share my reply to a question here. This question was from a reader, it basically boils down to this. FroKnowsPhoto switched to Sony from Nikon because they have the best autofocus (allegedly) and for him, that is the end-all-be-all to a camera. Should I buy into Sony for this reason?
The Nikon Z 6II and Z 7II now have the ability to take both CFexpress / XQD and UHS-I or UHS-II memory cards. There are a lot of different speed classes and ways to configure your camera to run with these UHS-II cards. This guide should help you get started on what you need for how you like to shoot so that you don't buy more than you need.