Faster frame rates and virtually no rolling shutter has made the electronic shutter a viable alterative. ILC mechanical shutters are incapable if shooting 60 FPS, and on those $6000 cameras very noisy and distracting at 15 FPS.
No wonder so many photographers (as opposed to silly polls) named the E-M1 mark II the camera of the year even though it was released at the very end.
Of course, as mentioned a 75mm F1.8 on the E-M1 will easily match the output of a $4000 FF camera/70-200mm F/2.8 combo. No one is denying that.
Oh, really? I don't see anyone who isn't denying that.
For the record, the 75mm F/1.8 represents everything wrong with MicroFourThirds as a system. The MSRP on that lens is $900! That's a lot for an amateur prime for a system with the 1/4 frame sensor size of M43. You can't really compare that with a 70-200mm F/2.8, from even a third party manufacturer. Incidentally, the little Oly is on sale for $750, and the truly excellent Tamron 70-200mm F/2.8 VC recently sold for $750 after rebate.