Lenses that I need and would buy in a heartbeat, that already exist:
Viltrox 16mm f/1.8 (fantastic lens, fantastic value, even takes 77mm filters, RF has nothing like this)
Sigma 35mm f/1.4 DG DN (RF 35mm f/1.8 has a sucky STM and no weather sealing, not happy with it)
Sigma 85mm f/1.4 DG DN (RF 85mm f/2 with the same STM motor and no weather sealing, not interested. 85mm f/1.2L - expensive brick = not interested. Also, just knowing the Sigma exists makes me not want to ever buy the 85L for triple the price, double the weight and a questionable increase in image quality.)
For 70-200 I'll stick with my RF because of best possible AF. It's the only lens I really want from Canon's current lineup. Perhaps the RF 200-800 after some reviews.
I would also get a Sigma 16-28mm or Tamron 17-28mm f/2.8 over RF 14-35mm f/4L because I don't need 35mm from an ultrawide lens and speed does matter. Don't want the 15-35 f/2.8L either because all my filters are 77mm and an ultrawide f/2.8 zoom doesn't have to be over 77mm.
I'd like to stick with Canon but it's getting increasingly annoying not getting those lenses.