Going all into the R5 would be very costly for me - with the body, adapter, batteries, CF express cards and a new RF lens, I'd be looking at $8-10K CAD easily. At that cost, I want something that is truly the best out there, with no compromises in performance.
Ahhhh . . . there is the rub.
The "perfect" camera! With "no compromises . . ."
But there are great choices of really fine cameras. All with their strengths and weaknesses.
Looking forward to my R5. Might even play with 8K a bit . . . eventually . . . might. Not sure what I'd play it on though.
Were I a video guy, I'd look at the 12MP Sony. I have no axe to grind. I use Canon . . . but I don't have any hate on for Sony. But 12MP is not acceptable to me so that new Sony is out!.
It's the folks supposedly "in business" that perplex me the most.
The gear cost is a business expense, largely written off in their taxes. If they really "need" 8K, a second R5 body, reserved on standby JUST to record 8K seems a mighty cheap way to get it. Beats the cost of an Arri, or a Red.
Methinks there is a lot of breast beating going on that is really just the same old fan boi gear wars we've always had.