When I got into photography for the second time, I started with m43, a Lumix GX80 was my camera, and I had a brilliant lens, a 14-140mm super tele zoom lens.
It was the camera I learned the most with.
A few years back I upgraded to a Lumix S5, I mostly run it with a 24-105mm f/4 lens, it is a perfect lens for most of what I do. I also have a 100-400mm Sigma lens for it.
I am looking closely at the Nikon Z series as it seems to have faster and more accurate AF then my S5....
However, I am still thinking fondly of the m43 format, and would love a G97 just for the ergonomics.
A Pen camera like this is gorgeous, and I would love one in my collection, the PEN-F m43 camera feels like a camera that got away from me, just beautiful, great performance and tiny, the only fault I could see is the lack of ergonomics, but without a heavy lens that is less if a problem