Yongnuo offered the YN450, an Android camera with enormous Canon EF mount:
https://www.digitalcameraworld.com/news/yongnuo-yn450-androi...
https://www.digitalcameraworld.com/news/yongnuo-yn450-androi...
Personally I like analog dials and like to have them configured to control ISO and shutter speed, so would have a hard time using a touch-screen only system like this. Same problem I have with the Sigma camera.