To bring it back to the topic then :), as a 'share my way of thinking '. Feel free to poke holes in it :).
I once jumped into the Olympus eco system as a cheap small second camera. I had an opportunity to go for a cheap em-10 mark 1.
I went huntjng for specs and reviews about what I would be missing compared to the mark 2. Turned out I could find little except more ibis axis and more art styles.
So, what would it being to my photography experience. Very little.
Later the em-10 mark3 came out, and again i could find little of added value to really alter my experience.
But the same for the em-5 mark1 and later the mark2.
I would have a bit of a craving for an upgrade , but i would always be looking at 'why did i get this camera and what would this upgrade do to my experience '.
Since all those cameras had basically the same contrast af, none would enhance motion shots of being movies into an interesting place. Later cameras went from 16mp to 20mp, but big whoop , what would that do for my experience?
So a few more mp, or an extra stop on the ibis, or a few more fps, or more resolution on a crappy movie recording , etc… It would all mean nothing for me.
So i kinda made a list for myself that a better evf, good phase-af and maybe handheld high-res and/or subject detection modes would me a worthwhile upgrade. That would really alter the experience of taking photos.
Since then i have been craving the e-m1 mark3 and om-1, but the new om-5 that isn’t otherwise liked also fits the bill.
It kinda helped to get my gear-cravings under control , to not think about ‘wanting something better’, but thinking how much i would notice of it during use , because that’s the feeling that will last for way longer compared to the ‘yay new toy’ feeling that only lasts a bit.
It surprises me in that context, how little difference there is between the Olympus generations , but also between the entry level (em-10) and the midsegment (em-5). I guess people will find other reasons to upgrade , but i was surprised how little there was in here.
Compared to the steps that Sony and Fuji have made in that time , for example (to be honest , Sony APS-C line up has seen very little movement as well ).