>>3899198>UHS-II V90 SD cardwell, here in burgerland, the quality sandisk stuff is about the same price. So you get a slower, less durable card at the same price. Maybe you don't like that you need faster USB type for those read speeds... that's why choices exist, I guess? I would hate to go back to 300 / 400 mbps read speeds particularly for video.
Just seems a lot of your arguments are preference as opposed to any sort of flaw of the system / camera itself. Maybe your Panasonic G9 or whatever you're using has a better EVF? That's about it. Card slots and back screen hinge is preference. Right now the Z stuff, including lenses hit a nice balance of price to performance and justify their existence.
That's not discounting M4/3, I think there is something to be said about the Panny and Olly systems and their nice balance of size and performance. Doesn't discount what the Z system offers, though. Particularly compared to other FF systems.