At 19 MB file size, jpeg doesn't cause compression artefacts. The only disadvantage relative to RAW is that jpeg is 8bit only, so RAW gives you some headroom in post-processing. What you see in these ...
The RX10 III is 24-600, which is pretty massive. I've got one and I use the 600mm end way more than I thought I would. m4/3 will likely let you get the same range with a couple lenses, or even one if ...