Reminds me of a few years ago, when a dude with a Pentax K-x and 18-55 kit lens, won one of the “best photo” categories, I bought the same kit (and traded it for a painting a few years ago) for $483. All those people who paid thousands for their kit, finished behind him in the public voting. If you aren't winning prizes, don’t blame your camera.
I think he missed a few points. My incentive for buying a Sony, Nikon or Canon would be the dual processing busses. ON one of those cameras, you can shoot continuously. MY Pentax’s buffer for birding and wildlife has buffer that holds 23 raws. AFter 23 shots in burst mode, the camera has to stop and process the images, ad you can’t do anything until it clears. You can’t change settings, My K-3 was about $2500 Canadian. For $7000 CAD I coud have bought a 1Dx. That could be useful. I know pros who gave up thier sponsohip becasue they shot in setting that didn’t allow for down time, fashion shows concerts etc.
MY feeling here is, if somoene offers me a contract that will pay me, and for the camera, I’ll buy whatever is best for what I do. If I’m not under contract, I’ll shoot with the best ccomprimises I can afford. And after 10 years with a 23 shot buffer, I can say, there’s only been my 5-10 times when it became an issue.