Well, I happen to be a wildlife shooter. For 20 years now. I have a several friends of course who are also wildlife shooters. We have all been using crop bodies (D60-10D-20D-30D-40D) and we all switched to FF several years ago. I know professional wildlife shooters, some world-famous, all used 1D with it's 20MP, and some of them have a 7D for backup. Now that 20MP just became 45MP or with the R6 20MP became much more affordable with even twice the FPS.
You don't seem to getting my point. I never said nobody would ever buy a crop RF body. I said it's much less reasonable than it was 5-8y ago. Also, just because there are people who do not have money, nor are they experienced birders using tents/hideouts, just want to walk around the nearby park and expect to shoot a sparrow filling the image and might be willing to buy an APS-C RF body, it's not really an argument against what I was pointing out. Invalidating a general statement with an exception is invalid
But I'll put it a different way for you. Using an APS-C body with an L lens was much more regular/reasonable 10y ago than now and especially in the future. Imho.