Okay let's dig into this. What are shooting exactly with your R8/R6 to where the cameras are interchangeable to you?
I'm not sure I'd call them interchangeable. The R6 is my main camera, and the RP is my second body. Sometimes I work with two cameras, sometimes I don't, it depends on the assignment. I always carry two cameras, but I don't always take the second out of my bag.
The R8 arrived about a week ago, I haven't decided yet whether I'm keeping it or not. I haven't really felt the need, I just ordered it because I found a good deal, it cost me less than €800.
I do photojournalism (not sports), and shoot some events and live music. Reportage, generally speaking.
Why is it weird to you that a R8 can do the same as a second R6? Their autofocus is the same (in my case, specifically, the R8 is better, since I'm using the original R6), they can be setup with the same two back button focus that I use, they can take the same lenses, the same speedlites, both have EVFs, both are somewhat weather sealed, both are cameras that react quickly (which the RP isn't really)...
If I put the 28-70mm f/2 on my R6 (which I do), and the RF 70-200mm f/2.8 on the R8, I get two stabilised cameras, so missing IBIS is not a thing.
I rarely use burst shooting, so buffer size isn't an issue.
I don't feel at all the need to purchase another R6.
Since the R8 came out about 5 months after the R6 Mark II, maybe the R8 Mark II will be released in spring or summer of 2026 with the same sensor as the R6II?
I wouldn't expect a new R8 before 2027 lol.
The R8 came four years after the RP, in 2023.