All things considered, you are better off sticking with your current system and various reasons support that. I have retired my old Olympus E-510 and E-410 as no one wants them, camera shops don't want them and they would probably sell for only a few £ on E Bay, shame really as they had excellent glass.
I shall stay with my Canon DSLR, it does every thing I want it to do, lenses on the used market are cheap, Pixel chasing and the pixel race between manufactures has been the incentive for many to upgrade, but the manufactures must take responsibility for using that as a major selling tactic.
My Panny FZ-330 bridge is great if you want to carry a camera round and nothing else for a day out
I'm not sure now what kind of markets the camera industry are now chasing, but its becoming more and more elitist as prices go up, all they are doing is making potential customers stay with their Phones for their photographic needs or phone users are not bothering to move up to a camera. I have an Olympus EM-10 Mk 1 bought on a whim when they first came out thinking I could build a system round it, no that never happened, great camera, great pictures, but so fiddly to use, its just too cramped , I was not enjoying a day out with it, so that might go,
I actually yearn for an A37 again with just a simple kit zoom, they were so easy to use, although I was never that in love with Sony colours, but they can be tweaked, For my type of Photography, which is predominately Jpegs but some RAW, I found 16 Mp on the Sony A-37 was fine as is the 18 mp on the Canon 650D
E mount is just crazy, less said the better and now we have the full frame race in full swing which means even dearer