I was a fashion photographer. I lived in a small market. To take the "next step" I would've needed to move to NYC or another big market. Also, I was getting paid a lot in my day-job to make that type of sacrifice. And it wasn't like I hated my day-job. I'm also risk adverse and not in my 20's to make that huge leap in my life. I also hustled hard and got burnt out. I stopped and started phasing out my clients.
I didn't see any downsides to using the Fuji ecosystem. I loved it. Every time I found something that might be disadvantageous in my line of work, they fixed it (eg. Capture One support). In fact, if I were to have upgraded, I would've gotten their medium format camera.