It's not about it being something I can't afford it's purely a question of whether it's worth the extra in the current market. I also have to consider the fact that it's £4,200 in the UK, which is a decent whack above the launch price of the 5D IV, even taking inflation into account.
Compared even to the £2,500 R6, which has many of the same improvements I mentioned the R5 has over the 5D IV, I have to question what exactly I would be getting for spending £1,700 more: much greater resolution and high end video specs. £1,700 could net me... well not one of the higher end RF lenses but at least the 24-105 f4 and 85 f2.
There's a difference between paying for features I know I won't use (that others might) and paying for features that aren't useful anyway. The latter is always going to feel like more of a rip off than the former.
I want all those juicy megapixels and will stump up the money eventually but I don't want to feel like I'm also paying extra for a developmental misstep.