Well my brand new Sony A7RV and the 20-70 F4 G lens arrived yesterday. Not had that much time to play with it, but here are some quick findings (which may change over time). Note, my main system is still my Nikon Z kit, so I'll be doing a comparison against my Z8 (and Z9 of that matter) in due course, but here are my very initial thoughts. .
There's been a lot of criticism it seems on the web over Sony's ergonomics. To be honest, this is my very first FF Sony body, and yes, it's different from my Z bodies, but still feels very good in the hands and quite "chunky". I do wish on Sony bodies however, that they moved the lens release button over to the other side, and added a couple of the custom function buttons to the front side of the body (like a lot of other manufacturers), but it's hardly a deal breaker. The size is still what's surprised me. Given the sensor and tech inside, coupled with the 20-70, it's really quite a bit smaller and lighter as a package than my Z8 with either the 24-70 F4 or 24-120 F4 lenses. The Z8 (contrary to what people think) isn't a behemoth in itself but the A7RV, is so much more compact and is in fact very similar in size and weight to my Micro Four Thirds Olympus OM-1 body (which the Sony kit may well be replacing, as it doesn't get much use these days)!
The 4 way rear screen is a joy to use and (like Nikon) I do love that there's a switch to swap between the Photographic and Video modes, however unlike the Nikon, you can totally separate the shooting mode parameters between the two (with Nikon for instance, the shutter speed and aperture doesn't remember the last setting used so you are having to constantly adjust it when flicking across to video). I have to say though, given so much hype about the 9.4mp viewfinder, yes it's lovely, but TBH, I don't find it significantly better than the much lower resolution one on the Z8 (or Z9). That's not to say it's not fantastic but the one in the Nikon's (despite the resolution), doesn't seem that far behind - as they are already great viewfinders (and don't slow down or drop resolution when burst shooting etc).
Despite what I said on the video side above, overall the Nikon Z8 still kicks arse on the Sony, in not only video specs but performance with not only 4K 50(60) with no crop, (as well as 4k 120 albeit with a crop), but with pretty much zero rolling shutter- which I've already noticed is definitely there on the A7RV in my brief play. I've a few trips coming up in the next few months so will be taking the A7RV (and the A6700) with me, and no doubt we'll see how it does over the new few months. The Nikon Z kit is going nowhere and tends to be used for wildlife shooting (as I have the 100-400, 400 F4.5 and 180-600 Nikon Z lenses already), so I plan to use the smaller A7RV as more of a travel and go anywhere camera body. Watch this space.
Oh, finally one quick question. As I don't have any CF Express Type A cards (have loads of type B), I'm currently using the camera with a couple of Prograde V90 256GB SD cards (as I purchased half a dozen some time ago when they were on offer for the Nikon and Olympus bodies). As I won't be using the camera for wildlife etc and therefore can't see myself using much of the A7RV's burst modes, I assume these will be totally fine to carry on using (especially as my MacBook Pro and Mac Studio already have SD readers built into them) ?