I am pleased to read that many people here have two m43 kits.
I carry a 'heavy kit' which will contain best quality (usually fast) glass dedicated to the subject which i intend to shoot that day.
IE. For sports it's usually the Olympus 40-150 f2.8 and em1-mk2. Nature usually the pl100-400 + em1-mk2. And for Astro/Landscape it'll be the Olympus 7-14 f2.8 or 12-40 f2.8.
But use a lightweight kit when just generally 'out and about'.
This normally comprised of one camera body and the Panasonic 14-140 MK2. If I think I may need wider the Olympus 9-18 is put in my pocket. And on the rare occasions when I think I may need to shoot longer - but not feeling up to carrying the pl100-400 - then I'll take the Olympus 75-300 MK2.
Camera wise with the'light weight kit' it'll vary. If photography not critical and distance to walk is long or demanding, it'll be the tiny Panasonic GX7. If better quality needed it'll be the superb Panasonic gx8. However if I don't mind the extra 300+GM's I'll take the Olympus Em1-Mk2.
When using a light kit there is little difference between the gx8 and em1-mk2 results. And I prefer the flip evf of the gx8. However I do get in s muddle at critical moments by frequently using 2 very different cameras, so try to stick to the Em1-Mk2 if possible.
This is the big caveat: when I get home and look at the images after taking a 'light kit', I always curse I didn't feel able to carry the pro gear So I am strongly considering on my next birthday adding an Olympus 12-100 pro to my collection.
I want to point out here to those who may feel less fortunate, that I was not wealthy. My collection of m43 lenses and cameras have been built up gradually over a 12 year period. Most of which unfortunately I could not afford to buy upon their release date, so had to wait for price drops. And many of the lenses were purchased 2nd hand.
How many of you have a 'heavy' and 'light' 2 kit system?