Might be true. The fact is, though, that most high end modern lenses are all very good as far as IQ. This is what I imagine, anyway. I've only used Canon and then also had a Tamron 15-30 that was good all the way around. I'm not too averse to manual focus (I have about 40 MF lenses), but AF done right is so much easier for me. My eyesight is pretty bad.Yes true. And perhaps weather sealing too? Still, from an IQ point of view I’m just not excited about the RF 50L at his point. It seems very good of course, but I’m not seeing anything which makes me think it’s better than what is already available for EF ... and it’s not like the RF 50L is small, light and cheap.
I actually prefer the heavy lenses. They just feel right for me. As I get older I think it is important to work a little harder too. The 28-70 f/2 is really the only thing exciting to me in R at this time. Like you, I'm waiting to see. Hoping for a better camera body before I could consider adding mirrorless. I know it is a pipe dream, but hoping they also do a longer f/2 zoom.