I think that's the next step. As fps and sensor readouts becomes faster these C cameras will become the norm in the future. We are just in a transitional state, it all started with the move to mirrorless.
Yes I agree, we are very much in a transitional state. At the moment I think it's only Canon that has had the sense to use different interfaces (in the R5C) for stills and video, but that has to be the way forward, in order to simplify usage and reduce clutter in the menus and EVF. In 5 years time I think all new cameras will be "C" types. A combination of global shutter, faster readouts, more powerful processors and increasing use of AI tech and in-camera image-merging should make many things possible.
A few random thoughts:
Stills and video ideally need different AF algorithms and tracking systems, as well as different interfaces and different stabilisation processes, but that's easy to incorporate when stills and video options are completely switchable within one camera. Hopefully Canon, Nikon and Sony will all have the sense to follow the examples from Panasonic and Fujifilm by fitting rear screens that can tilt on-axis for stills, but also flip out for video, and reverse for protection too. Then, stills shooters will no longer be able to complain about video stuff intruding or distracting them. Advanced video and stills shooters will have everything they want, in a single camera, with no compromises made.
But I also think FF cameras are just a temporary phase, because so much more in terms of AI can be done with smaller formats, as demonstrated by smartphones, and by the latest M43 cameras -
At the moment the main limiting factor of M43 is the 20-25MP resolution, but if really fast readouts and very fast burst rates (100fps) can be achieved, it should ultimately be possible to use pixel-shift even for *some* moving subjects. (imagine shooting a 5-shot sequence in 1/20 second, having them aligned and merged in-camera, and output a couple of seconds later). It would also enable very fast processing of in-camera focus stacking, HDR and other processes which require multiple sequential images to be merged. Another by product of image-merging is that it reduces another "problem" associated with smaller formats, i.e. luminance noise.