I sold my Sony A9 II and A7R4 and purchased the A1. The new menu is better organized, but has more setting and unfamiliar additional verbiage. There are other minor difference that no reviewer mentions...inconsequential.
Its not perfect but its better than my previous Sony cameras. So far I like it.
Here are some of my initial images...most likely I'll do some refinement as I get more accustomed.
Very good images, I love bird shots.