I'm a wedding videographer and despite the apparent overheating issues, have put in for a preorder. Now while I obviously haven't tested the camera and can't know this for sure, I've already budgeted for ways to mitigate the heat issue. I've already got an atomos ninja v which I plan on using majority of the time, and when only recording to the SSD and not internally, the atomos will be doing all the heavy lifting with the processing. This also unlocks unlimited recording time. I'll also be using the battery grip so that the battery heat is removed from the body. These methods have been successful overheating solutions for all the former sony overheating issues and I expect them to work on R5/R6 as well. It also means I get some sweet downsampled 10 bit 422 prores files to work with
The 4k 120 is a big perk, and I plan on using this in short bursts during location shots. Outside of that, all recording will be done externally
Some will ask why I don't just spend the same amount on c200 or similar. Main reasoning is I also do landscape photography and sell some prints, so I'd probably be buying this anyway.