> Its crazy to me that there isn't a modern version of this kind of camera.

There is, I own one, and it has every feature in your list! YONGNUO YN455, Android-10-powered 20MP Micro Four Thirds camera: https://www.hkyongnuo.com/productinfo/660161.html

LTE band compatibility would be an issue for many, but I have it working successfully on T-Mobile US. I don't prefer using it for stills over my Panasonic/Olympus bodies, but I love it for video.

Here's what it looks like: https://i.imgur.com/3mdBWXt.jpeg (my photo, with Laowa 6mm Cinema lens)

And here's what it sees: https://www.youtube.com/watch?v=pzlBA2wSU7w