>>4158524I had a Z6 with a couple lenses and bought a cheap EM5ii off a guy for like $200 as a little beater camera. I loved it so much I sold my Nikon stuff and went full in on MFT. This is mainly because I love the ergonomics and how I could still get a whole weather sealed kit that was small enough to fit on a thin leather neck strap.
If you really don't care about size and care a lot about IQ, I'd stuck with FF. If you would rather have a convenient and small kit you're more likely to take everywhere with you, I'd get the OM-5.