In fact, I decided this week to trade in my battered 5D3 with >150 k actuations (still working flawlessly) to get a special discount on a new 5D4. Prices for the aging 5D4 are dropping massively and I decided to still wait a little bit and watch Canon building up their R system. The R5 will be quite expensive, maybe close to the price level of the 1D series I guess, an R6 and a crop R7 are still rumor, the R does not offer enough for a multi purpose workhorse camera how I need it, the only semi-attractive option for me so far would be an additional back-up RP for small and light gear. But that's my personal profile, of course.Many that own 5Dmk4 and mk3 and slowly transitioning to mirrorless
Overall I am very happy that Canon now builds up their R system so fast. Looking in Canon's history, they react typically: they watch new a technology rising, staying conservative for a while, and then they really give it a go. So I think that Canon's bold move in the R system right now is generally good news for all of us who have heavily invested in Canon systems: there's a future, definitely.