[prolepunk]

The big advancement for micro 4/3 in the last two years has been image stabilization using lens and sensor working in tandem.

A more recent sensor advancement is dual native ISO in GH5s, which make the system's long downside -- low light performance, a much better proposition. I'm hoping this technology will find its way to cheaper offerings.

There are a few fast new lenses that have come out. I particularly like 25mm f/1.7 that's under $200, there are also a few ones on the higher end.

Another selling point for micro 4/3 that they can use virtually any vintage lens with a simple adapter.