this POV would be perfectly reasonable if I had only one camera.
You previous claim was for a "liberating" _advantage_ to not being able to change the lens on a camera.
My reply is that there is no advantage (one can get the benefits you claimed by buying and carrying a camera with a single lens, whether or not that camera allows the possibility of changing the lens.)
The option you now mention of owning other cameras does nothing to support your previous claim of an _advantage_ to the non-changeable lens option; at most it mitigates the disadvantages.
P. S. I agree that for now, the RX-1 offers a combination not reproducible in any "system camera", so there is a legitimate market niche for it. I also expect that niche to shrink or vanish if and when camera makers like Sony offer new mirror-less systems with 36x24mm sensors and changeable AF lenses designed for that system. (Bodies that rely on manual focus rangefinder lenses or SLR lenses do not count.)