It was fun when it lasted but 10 years after the micro four thirds format was launched perhaps the end is night.
A couple of years ago I lamented the ever increasing size of mft cameras and the subsequent loss of their advantage. At the time I mused that thankfully pro end mft cameras remained smaller than their larger format counterparts (https://davebobphotos.com/2016/07/18/is-there-a-benefit-to-micro-four-thirds-cameras-in-street-photography/).
But this is no longer the case. I had read some criticism in the blogosphere about the large size of the Lumix G9. And today I have finally been able to compare it online to Nikon’s full frame mirrorless Z series. They are nearly identical sizes. And for the record the Sony A7 III is smaller than the G9. (See camerasize.com)
The size difference will remain in the lenses. Mft lenses can be smaller and lighter, and because of the crop factor effectively longer. So under certain circumstances I can imagine a comparative advantage to mft.
But for someone shooting primes in the wide to short tele range, I suspect there will be less advantage in mft lenses. And the image quality and noise handling of full frame is likely to persuade many away from mft.
Where mft used to excel was size and price but now both have crept up close to their ff equivalents.
I hope I’m wrong. But if I was a pro or wealthy enthusiast, I’d be hard pushed to consider mft now.
Perhaps Olympus and Panasonic have acquiesced to the ff mirrorless crew. But if not, in my opinion they need to remember the competitive advantage they used to provide by being a little smaller, lighter and cheaper without compromising quality.