M43 and crop sensors: noticeable differences?

To be fair though, if you’re into longer zooms, the micro four thirds lenses can’t really be made much smaller than the FF equivalents compared to shorter focal lengths, at least if you want similar apertures. And then lots of people are happy choosing a lens like the 180-600mm or even the 500PF (which is an incredible bargain used now) to use with a camera like the Z50 II – and the 500PF provides more reach (in terms of pixels per target on 20MP APS-C) than most micro four thirds lenses.