I’ve shot with Micro Four Thirds essentially since it’s inception in 2009 with the Panasonic GF1. Back then, it’s main differentiator was the size. In addition to that, today we’re seeing µ43 first to the race with things like IBIS, Dual IS, 4k, etc.
Stabilization was a game changer for me. Not that I even attempt the 1+ sec handheld shots that some people boast about. But the fact that I can shoot at 1/60 and not have to worry about a tad bit of camera shake is amazing. And if I want to bend the handheld rule a little bit (adding 1 before the focal length ie. 100mm =1/100s), I can.