It's not unreasonable. We don't know how long Canon will keep up the pace of 6-8 new RF lenses per year. It was looking like they may fail at that this year, but if they do launch the lenses that CR has recently mentioned (
28-70/2.8 non-L just rumored today, 70-200/2.8L Z, 24/1.4 VCM and 50/1.4 VCM) that will put them at 7 lenses for 2024...if they can start shipping all of them, since Canon counts lenses when they ship, not when they're announced. But if they do keep up that pace, they're getting to the point of rounding out the 'usual' lenses. For FF lenses launched (apologies if I missed any), we have:
- 6 standard zooms
- 4 ultrawide zooms
- 6 telephoto zooms
- 1 superzoom
- 6 L-series primes ≤135mm
- 6 non-L primes ≤85mm
- 7 'exotic' lenses (supertelephotos and the 5.2mm dual fisheye that I didn't count with L primes)
- 2 extenders
In other words, while there will still be 'usual' lenses (e.g. wide/normal L primes), it does seem like it's time for them to start mixing in more exotic lenses, e.g. mid-range superteles (still $3-4K+), TS-R, long macro or macro zoom, fisheye zoom etc.
There were roughly
122 'unique' full frame EF lenses, with unique meaning the count omits the Mk II and subsequent versions of a lens (one went up to Mk V), but for example includes updates that added IS or lenses that are the same except for the AF motor. We're at 38 full frame RF lenses so far, meaning only 1/3 of the EF catalog is represented in the RF mount. I'd interpret that as meaning there's at least some hope for any reasonable lens to come out over the next decade. Obviously, Canon will decide which lenses to prioritize based on their assessment of the market.