I look forward to diving deeply into this thread later today, as I am super curious about what other photographers have to say.
While I am far from the business side of photography compared to you, Steve, I do consider myself a very serious semi-pro. I have worked as a Biology Educator and Teacher Instructional Coach for nearly 30 years and was an academic in the area of field ecologist. in addition to finishing out my teaching career, I lead photo workshops, seminars, and publish articles about nature and nature photography.
Unlike "real pros," I do not make a lot of money with my photography or my workshops. I am lucky to make $5000 in a year with my work, and use this to offset some of my travel expenses. Since nature photography is my "one thing" that is not a part of my "A-jpb," I describe it as semi-professional work. This, however, is just my way of justifying the expenditure for a very serious hobby
. So, it is with this reality, that I am answering your pole.
I do not intend on switching my gear for three primary reasons:
1. I have a lot of Nikon equipment (D850/D500/Z7/Z6/Z6II cameras and 500PF, 300PF, 70-200 f/2.8Z, 24-200Z, 24-70Z, 14-30Z, & TC14Eiii). While I have sold off my expensive f/4 super-teles, I still have a lot of money invested in Nikon.
2. Sony is the only company I would consider, and if Nikon's forthcoming 100-400 & 200-600 are not promising, I might give them a closer look. With that said, portability is a premium for me and Nikon's PF lenses fit my style of shooting, need to hike/camp, and travel limits.
3. I contend that I have not outgrown my gear. While I am a fairly skilled photographer, my DSLRs and Z-bodies outperform me. Since I do not specialize in flight photography, I do not feel as if I am limited the AF in my cameras. Furthermore, I understand how to process Nikon images... for me, this latter point is huge.
bottom line... I am open to switching, but I am unsure if this would have any real impact on my photographic output.
cheers,
bruce