I think the extended debate on this topic has maybe left a wrong impression, at least from me. I can count on one hand the number of times I have actually cleaned a sensor over the past 10+ years on Sony, other that just using a blower. Truth be told I often skip it, it is just a precaution in certain shooting conditions, since I have cats at home and live in what can be a dusty part of the world (arid plains). And I only see dust for certain image types, e.g. sunsets or skies are a big one. I do not find the precautions burdensome, and it only takes an extra couple of seconds if I use the blower. I do not know what Olympus does to keep things clean, but at least some other makes of mirrorless cameras have their own dust issues as well from discussions I have seen elsewhere. I do think perhaps sensor size plays a part, as in thinking about it I do not recall having dust issues when I shot Sony's APS-C bodies.
As to PP, the same sort of debate occurred back when I learned film. PP is just the modern equivalent of the darkroom. Some prefer to more or less take whatever they get back from the processor, others like the control to manipulate the photo into an image they 'saw' in their mind, or correct things that did not come out. I think Ansel Adams is the classic reference, as he was notorious for how much he would manipulate his images afterwards. Personally I shoot only RAWs. Most don't get a lot of changes, just editor defaults/presets, but my best ones usually do have some editing. (I might have perfectionist leanings or OCD, lol.) If you can get it all done in camera, that's great, but for me I do not think it is a gear issue, it is just how it works itself out.
I've babbled on enough. I am glad we can have interesting and civil discussions here and that is why I continue to visit.