I think the forum has become a venting outlet, for myself included at times. It is disheartening to see other competitors products advance in terms of camera technology, IE Nikon 1 series / Sony A6xxx / A7XX / Samsung NX1 while Canon does the same old repackage existing technology into a Mirror-less offering (EOS M is a T2i sensor with contrast detect, EOS M2 is a SL1 sensor with an extra mode on the dial, EOS M3 is a 750D sensor with extra dials, a semi DSLR grip and an option for a G1X II EVF) and then software-govern it to limit it's ability to cannibalize other product lines (limited video bit-rate, the EOS M2 has 50mbit vs the M3 has 25mbit, makes a huge difference btw, plus unlimited JPG output, yet limited RAW?)
To answer your question, I've honestly considered switching, but to do so would mean the following...
Sony A6300? $4000 in equivalent Sony/Carl Zeiss E mount optics + A6300, which I might also question if they are superior optics, I'd say they aren't. So more expensive, a lot more expensive, and less optical quality and iffy Sony colors out of the box? Pass.
Nikon 1 Series? The 1J5 does 4K, a backlit 20MP sensor, has some good lens options but the J5 doesn't do EVF, the 1V3 that does has a poor performing non-backlit 18MP 1" sensor and is expensive in addition to being poor performing in indoor/low light situations and no 4K. Pass.
Samsung NX1? Too big (it's a DSLR in size, but mirror-less in technology which is what's the point?), expensive, lacking lens options and oh by the way, is unofficially discontinued.
Fuji? Haven't looked at them. Don't care to, no offense.
So I'm stuck waiting, and gripping while I wait. That said, if Canon does pull a rabbit out of their hat, which I have faith they will, just a matter of when (Q3/Q4 of this year, ugh, what a wait), those upcoming patented lenses look pretty juicy to go with a high speed Pro-M, IE 55-300 DO IS STM and even the "slow" 50mm 2.5 Macro EF-M, it's a macro, and almost takes the place of my EF50MM 1.8 STM + adapter, except without the adapter but does macro. Not too shabby. Those have to be cheaper than the inferior and Sony glass.