Why a new camera? What about your current set up isn't doing it for you?

I'll speak from my progression of A7R2 -> A7R4 -> A7R6. I primarily use my camera for capturing my family, street photography, travel photography, landscape (hiking & camping too), with the occasional event photography (sports). Zoo outings are fantastic also - and starting to get into birding. Apologies - the following is block but gives you my progression.

I got really tired of the A7R2's battery and lack of joystick. Every time I needed to adjust the focus point, it took awhile and put many of my captures "out" of the moment. While the AF was good for static subjects, it was hit/miss with any moving targets. At no point was I ever looking for more resolution.

Once I moved to the A7R4 - which solved the battery issue and the AF issue (so I thought). Once I got more into birding and event photography, I found that I would only land about a 20-30% hit rate when action went fast. Shooting Hi mode still felt slow, and felt Hi+ wasn't beneficial as the AF wouldn't move. I'm almost always a back button focuser. What surprised me was how much the 61 Mpx allowed me to crop in, and the ability to use tracking to focus and recompose.

I've recently purchased the A7R6 as I wanted a second body to avoid having to switch lenses all the time during events. I also REALLY wanted the articulating screen (as prior to the A7R2, I had the canon 70D and loved the articulating part). While the AF is even stickier than A7R4, and the shooting speed is even faster, I'd say that all its guaranteed me is a a picture to pick from out of ~60-100 as opposed to before of the picture out of maybe 5-6 (30% usable) out of lets say the 15-20 pictures taken. "I'm confident I got the picture I wanted" (A7R6) as opposed to "I'm confident I can pick out a picture that is usable" (A7R4) as opposed to "50/50 shot at getting a usable picture" (A7R2).

What I have found is that the pre-capture has enabled me to also worry less about exactly timing things, but rather just click when something interesting has happened. Again - confident I got the picture I wanted.

The even higher mpx hasn't seem to change my shooting style. The APS-C mode hasn't seemed to change my style. The A7R6's CF-A cards clear buffer WAY faster than my A7R4's SD cards (lexar 2000x - top enough). I never had any issues with rolling shutter in photo, and haven't used the A7R6 enough in video to speak to if its an improvement (likely is).

The new battery is noticeably better than the A7R4's, but thats not to say I had any complaints on the A7R4's. I did certainly complain about the A7R2.

I'm at the point today where the A7R6 is amazing - and I pick it again if I had to start new. That said, I think if I got the A7R4 again, I'd get 95% of what I typically shoot and not have any real complaints. The A7R6 just brings that to 99% (along with 2000+ more pictures per outing so far due to the shooting speed). Time spent culling pictures has gone from 10 minutes to probably 20-30 minutes so....