Well put. For some people, the R is good enough to buy, for others not. It is good enough for some use cases, but not all. A lot depends on what your use cases are, and what equipment you have. I have a 5DIV and that is enough for me for right now.The only advantages of the R over the 5DIV that I see, apart from the buffer, are 1) A couple of great new lenses, 2) Doing away with AFMA, and 3) More AF points for, supposedly, easier composition.
No, I haven't used the R, but I can see that it does not appeal to me ergonomically at all because of the layout of the controls.
Canon pulled a fast one here by getting photographers excited about "potential" and a few amazing lenses ready right now. But did anybody get excited about the R camera itself?
That's why I, and, presumably other photographers, see the R as a something of a promise of better to come, a placeholder to buy time, and a prototype which allows Canon to have consumers pay for a lot of R&D. (And it gives the repair techs good training with FF mirrorless.) This is solid, clever, and even admirable business acumen.
Will the next release of a FF mirrorless have some EVF breakthrough that reduces the lag that makes it difficult for action/sports? Will it have a sensor that allows for no (or much less) 4K cropping?
(Yes, 4k seems to practical photographers an unnecessary feature, but many customers already have 4k TVs, so they likely imagine how awful it would be to have a shiny new camera that doesn't match the native resolution of their displays at home...)
An interesting couple of years ahead for photographers and the industry!