I agree that taking TCs is a good thing but why is internal zoom a "real bonus"? Surely storage length is an important benefit of the RF lenses.It's interesting how the EF 35/2 IS is priced at $600, and the RF 35/1.8 macro is priced at $500. I had hoped we'd get a similar break on these two new workhorse lenses. Not so. The 50/1.8 went up in price by 60%, and the 70-200/4 went up in price as well, for the RF versions. This in spite of MTFs that show that these lenses perform similarly to their EF brethren. Also, the EF 70-200/4 IS has internal zoom which is a real bonus, plus it takes teleconverters. So in all I see no strong reasons to upgrade other than shaving off a few ounces.