I would like to clarify that I never said that there are RF non-IS versions of the 70-200 zooms today or more general telephoto zooms that fits within 70-300mm range. I expect those to come before year 2030.Are you suggesting that new RF non-IS versions of the 70-200 zooms would somehow serve as cheap alternatives to the IS versions? Sorry, but LOL. Still not seeing the point of non-IS versions. Same story for the telephoto primes.
Canon could easily keep those lenses unchanged because the development was a sunk cost. That would not be the case for new RF versions, which is why we won't see them. Canon wants people to buy the RF 100-500L with extenders, and for those without sufficient funds they offer the RF 100-400, 600/11 and 800/11.
Look at this from a price strategy point of view that covers all price points. It may come to a surprise to many but not everyone can afford the latest & greatest at the drop of the hat. Canon is interested in offering goods to all users.
Take the most basic of focal lengths: the 50mm
- 1993 EF 50mm f/1.4 USM
- 202? RF 50mm f/1.4 STM(?)
As Canon has a generous margin this allows 3rd party lens brands like Sigma, Tamron, Tokina, etc exists.
Historically the EF bodies does the same
- APS-C has 8 product lines that ranges from entry $389 to top end $1,799.
- Full frame has 4 product lines that ranges from entry $1,999 to top end $6,499.
- Full frame has 6 product lines that ranges from entry $999 to top end $5,999
- APS-C has 2 product lines that ranges at $949 & $1,499.