Yes, the 14-35 is a little different from the 16-35, but I think most people would consider them essentially interchangeable in their kits, which is why people talk about the 14-35 as a replacement for the 16-35. I can't imagine too many people keeping both in their kits. I certainly see the 14-35 as just the 16-35 evolving to its next version, not something fundamentally different, and therefore as an update of and replacement for the 16-35.
I feel the same about the EF 100-400L II and the RF 100-500L.
Progress inevitably has a price, but Canon is certainly putting a very high price on it if you ask me.
High price indeed.
TL;DR: BOTTOM LINE: This glass is expensive. Why do I want to replace already great EF glass with more expensive RF glass?
The longer post:
So I am a gentleman of a certain age.
I *can* spend the money if I *wanted* to spend the money.
I have found that it is NOT a coincidence that those who have money are those who are not inclined to spend it.
I have found that RF has been an effective and immediate cure for GAS (gear acquisition syndrome). . . . looking from the perspective of a
gear junkie. I am in no way a paid photographer. . . . . I have been tossing out $1-$2K every year or so on camera toys. A small vice; one that (over a decade or three) has resulted in a nice collection of EF glass and EOS bodies. However. . . now in one year I find that *simultaneously* both my dSLR body and *all* the lenses are "obsolete".
With a liberal application of cash* I could resolve this and get a full RF kit. OCD and GAS issues resolved. . .
I might grimace when the visa bill shows up. . . but it is doable with a smile on my face.
But two simple facts gnaw at me
* at the core; RF is an *incremental* improvement over a dSLR. Sure. . .electronic viewfinders are nice. . .sensors are improved. . . . . but fundamentally, dSLR's are quite capable of taking nice pictures. Explain again why I need to refresh the entire system?
* Essentially, the "ask" is "Please rebuy all your glass". Now. . .if the glass was
smaller or
cheaper. . .then I might be convinced to spring. But that is NOT the case. Sure - - you can get by with adapters. But honestly. . . if you could make do with adapters. . are the bodies that much better you can't simply use the old dSLR body with the old quality EF glass?
Honestly. . . the "ask" is to basically repurchase the system. Hmmm. . . If I am repurchasing the entire system. . . .Sony makes camera systems as well, right?
Meh. . . .my GAS is like my drinking. I really can stop anytime I want to. I can keep my credit card in the wallet; as I have for the last 18 months Honestly. . .considering my *life* right now; what I really want is the EOS M system. Small bodies. . .. not hideously expensive. . . .but CRUDDY GLASS SELECTION . . .give me a set of decent F4 glass (don't give me F6.3 balderdash) . . and I would buy a complete system TOMORROW.
* Covid. . . . . I could spring and buy a system with a liberal application of
cash . . .but the simple reality of 2020 and 2021 is that . .
the product is not there. A $7K impulse buy
from a reputable dealer is NOT an option. As far as I am concerned. . .the entire RF system is vaporware as I can't get my hands on key pieces of glass. That makes it real easy to NOT COMMIT to the RF system.
A strange world. . . .I also had both a car and a house on my 2021 agenda . . . Covid is preventing both of those (Car dealers have no inventory) (and I don't need to buy a house during an obvious housing bubble).