I didn't know it was a club.
I've had FourThirds format cameras of various types since 2007, both Olympus and Panasonic systems. Still have an E-1, E-M1, and E-PL7 although I haven't used them in a while. The Olympus and Panasonic-Leica lenses are terrific. I made (and sold/exhibited/etc) a lot of work with these cameras in the latter part of the '00s and early 20-teens. The E-1 remains my all time favorite DSLR.
The E-M1 and E-PL7 cameras are hugely configurable and customizable, thus the complex menu system. Once you 'get' the logic of it, it's good (and of course it doesn't make much difference once you've got the camera configured and are just shooting with it) but it's not for those who use a camera once in a great while and want to change configuration frequently as well. When I was using the E-1, E-5, then E-M1 every day, I'd developed my configuration setups in the first week or three and then it was just use the camera, a lot.
My favorite lenses for this system are the Olympus ZD 11-22mm f/2.8-3.5 ED, the Panasonic-Leica Summilux-DG 25mm f/1.4 ASPH, the Panasonic-Leica Macro-Elmarit-DG 45mm f/2.8 ASPH, the Olympus ZD 50-200mm f/2.8-3.5, and the Olympus M.Zuiko 85mm f/1.8, the Olympus ZD 35mm f/3.5 Macro, and the Olympus ZD 50mm f/2 Macro. The ZD series lenses are from the DSLR system, but add the mount adapter and they work perfectly on the E-M1 and E-PL7.
I use these cameras so infrequently now that I should sell them and clear the space in the closet, but they're still such good photographer's tools that I remain reluctant to.