I wouldn't disagree with you, heck my Pixel 3XL takes fantastic shots.
I got into the 4/3 system back in the early 2000's when the E500 came out. The keys things that drew me to the system were the compact size, relative affordability, lens quality, colour rendition, SW sensor cleaning. They also offered wider angle lenses that APC struggled to provide at the time (due to angle of incident light falling on sensor).
As you say, unfortunately with the m4/3 sensor they have backed themselves into a corner with nowhere to go when folks are nowadays wanting more than 20MP and/or better low light performance.
I've a nice selection of 4/3 and 1xm4/3 lenses that I got off ebay over the years for good money and an EM1 MK1 and I will stick with what I have for the time being. I might be tempted to get a EM1-MKIII if there is a fire-sale but I've certainly no plans to ditch what I have and spend 1000's on replacing it all. I ould also greatly miss the compactness of the system and weather sealing.
It's possible that JIP may actually help move the tech forward but just as likely that they'll asset strip it and we'll see junk cameras with the Olympus brand on them. Unfortunately JIP don't seem to have much of a track record that helps form a clear sense of their directions, besides that VAIO story which is pretty much the only other example that anyone can point at and I don't recall VAIO having had any especially interesting patented tech back in the day.