Daniel, for me the factor was cost, either way i couldn't go wrong . I couldn't go full in with a Sony A7RII or III when i'm just getting into this, gonna give this a go for a bit and see where I am in a few months. Luckily i have a mate who has the Sony so i can play and compare. For me at least the Fuji is a bit small in my hands, so that needs getting used to , but i do love the portability of it. I have it paired with a 35 2.0 which is amazing. AF is out of this world , compared to my 5D it is night and day. It's been snowing and cold here so i haven't had a real good day with it yet .
Hope that helps a bit Daniel
One more thing Daniel the crop factor has thrown me off a bit with the Fuji especially with composition , where as the FF on the Sony was the draw for me. I haven't shot on a crop cam in a very long time, but like other things I'll get used to it
That does explain it. I have the M5 and IQ/feature wise I love it, I just wish it had a FF sensor. I mostly shoot primes so I'm used to knowing exact what distance I need to stand for the composition I want so using the crop sensor always throws that off.
Fuji has some really nice fast lenses which I liked the look of before getting my M5. Also when it comes to cost, the Sony bodies are definitely quite pricey.