I think it is more a ding on the non L rf lenses. They are pretty slow for the price and some of which use plastic elements. The 85mm f2.0 rather than a 1.8 for example on the slow side and the 50mm 1.8 that definitely uses plastic elements.

The real issue is that canon went after both Samyang and Viltrox for making cheaper and better 85mm and 35mm rf autofocus lenses. So basically you either have to adapt older ef Lenes many of which are 20+ years old and not really made for modern sensors and AF or pay the L premium or settle for sharp but slower rf non L glass that is kinda over priced.

I agree. But the problem is that most vintage glass is stupid heavy. The EF 85mm 1.2L which is around 700 used is like 2.5 lbs so it is a terrible carry around/travel lens. It weighs about the same as my Hassy x1d ii with the 45p lens.