There are no real size/weight savings with FF mirrorless. So why introduce a new mount to shave a few mm's off the body thickness?
The main size advantage of the mirrorless design can be seen when looking and the body and also when using wide angle lenses.
Just a quick comparisson:
https://camerasize.com/compact/#682.425,777.440,654.31,ha,t
Greetings
Ivan
the only advantage to a short flange distance is with lenses with a FL wider than 35mm ...and that is moot as the EF mount has a big diameter ...if a wide lens was designed for a MIL EF mount camera with no mirror some of the lens can fit inside the body..leica fit lenses have been doing this for 50 years with up to almost 1/2 the lens in the body for a very compact rig..and canon to a certain amount with the EF-s lenses as the APS-c mirror is not as big obversely this will be a MIL lens only like the EF-s is APS-c only
in your camera size demo you used a 5D ...but when you don't have a mirror ,a mirror motor and gearbox ,no AF module ,no light path to the VF and a EVF takes less space than a pentaprism/mirror canon can fit a FF sensor in say a SL2/200D body so lets comper the most common of lenses the standard zoom
Thumbs up if you would buy a FF SL2
FlANGE DISTANCE CAN HAVE NO BEARING ON CAMERA SIZE
Here you see the grip on the sony sticks out more than the canon flange.. both cameras will fit in the same compartment of a bag
Tiny FF camera with a bigger flange distance than the EF mount
--
Attention Dislexsic i mean dyslexic person... This post will have many although spell checked, spelling and grammatical errs ..its The best its going get so no need to tell me its bad i know it is .....................................................................................................
My 5D IS a MK1 classic
..........................................................................................................
There is no argument for FF vs APS-c (or m43) with shallow DOF..as it's a law of physics and a very subjective personal thing if you want to make use of the shallow DOF only FF can offer
...........................................................................................................
Political correctness....somebody being offended on someone else's behalf....who that someone doesn't give a damn in the first place ....David Appleton
..................................................................................................
quoting irrefutable facts may get you branded a racist ..even if no race is involved .......David Appleton
.....................................................................................................
The word ‘racism’ is like ketchup. It can be put on practically anything — and demanding evidence makes you a ‘racist.’”........Thomas Sowell