A retracting interchangeable lens system

Ok, I realize it is a crazy idea, but we are seeing crazy ideas implemented these days...
So this has been on my mind for a while.

I am not big fan of retractable lens cameras, but I do like grd line...the big advantage of them being completely pocketable. The big disadvantages: dust and inability to change lenses.

how about the next grd getting an interchangeable lens. A 40 and a 21 lens to accompany the 28.

All three retracting lenses...but interchangeable...they will sit in your pocket safe in their sockets...

I think that would be quite neat little thing. Some sort of upscale version of pentax q...

I think it would also be possible to squeeze a slightly larger sensor in that system without changing the form factor...
What do you think?