M43 is a good comprehensive system but it's def not for everybody. There's a reason it has small market share
True.
I'd like to add that for (most likely) 75+% of the people now shooting a larger sensor format camera m43 is more then sufficient - and sometimes even the better option - but misunderstanding, misinformation, uninformed sales people, etc result in m43 never ever being considered an option.
I fail to see how a system with a smaller sensor that is also more expensive (and sometimes larger bodies) than an average system with bigger sensor is a better option for those 75+% of people. Less imaging surface at a higher price is better, how?
Reality is that it it can't be beat given the size/weight/price compared to larger sensors (maybe aps comes closer but only Fuji takes their system serious).
I have an allround travel package of 3 bodies, and three lenses a 7-14mm F4, a 12-40mm f2.8 and a 40-150mm f2.8. this gives me a range of 14 to 300 MM with 24 to 300 covered with f2.8 lenses.
This package fits into a small backpack, is half the size of a FF setup with f2.8 lenses and is 2 to 3 times less expensive.
For 90% of my shots I want large DoF so, that characteristic of smaller sensors is excellent for my purposes.
This setup is more then enough for most people, and will give you excellent IQ!
Of course, if you want the best of the best for shallow DoF portraits with just one eye in focus and the tip of the nose out focus (I can do that as well with the above setup by the way) or shoot high DR landscape and need to push the shadows a lot in post, and maybe low light sports an you are willing to shell out for a 300mm f4 Canikony, yes... FF may be the better option for you.
But how many of the people shooting photos have that as an absolute requirement or how many have hit the limits of a smaller sensor system?
That number I believe is a pretty low!
So... for most, they will not hit the system limits and they will not experience a lower IQ. But they will have a smaller, lighter less expensive system. I know I have.
I am not stating smaller sensor systems like m43 are better then FF. It has it strengths and weaknesses. So do FF. I am just saying, giving its strengths and weaknesses, m43 is more then enough more a lot of people that are currently buying into a FF system, and they may be paying more then is necessary, carry more weight (or less lenses because they can't pack all the lenses they want to) then is necessary.
And you know, if you just like the big guns... it is a free country (ah... perhaps no longer the USA)... you can buy whatever you like and who is to say that is wrong!