OK, that semi-rant aside — to return to the topic of this thread, digital correction being here to stay, I have a few more thoughts:
First, I think that what the VCM line represents is a good thing. I very much enjoyed the classic Canon EF prime line-up of the 20mm, 28mm, 50mm, 85mm, 100mm, and 100mm macro EF gold-ring USM series. I now very much enjoy the L series upgrade for the equivalent prime line (but I kept the 20mm -- the rest went to my kiddo). With the addition of the 14mm VCM and the hybrid-shooting qualities of the set I do feel these are spiritual successors for that gold-ring line, but with an L-leaning bump in quality thanks to the passage of technology and time (in the same spirit anti-lock brakes were passed on to the consumer from airplanes and F1 cars). For the modern lens investor, the VCM line should bring decades of joy.
The fact that the image circle does not encompass the full sensor and digital correction is needed to make the full resolution image as promised by Canon in terms of the camera sensor is an implementation detail. You can like it (as some do) or not (as I am prone), but it is functional and the results seem overall good -- as least as good as a corrected image from a gold-ring prime, if not better. I think it's fine for Canon to pursue this strategy. Especially since it doesn't seem like Canon's software is making up anything that a standard stretch and lighten achieves elsewhere.
But I have been thinking about the lack of sensor coverage in another way. Canon promises a resolution based on a sensor when it sells a camera: 45mp for the R5 line, and 20-32mp for the R6 line depending on when you buy-in (I ignore the exact dot count here but do assume I am focused on the exact amount in the brochure). Here's the rub: if Canon were to move its total consumer accessible lens line to less than sensor coverage then I bet (and it's a very educated bet) that a class-action lawsuit could be brought to bear with the claim that Canon makes a false promise with its camera line as the advertised resolution of the camera is not being provided to the consumer. It likely wouldn't matter if the extreme lenses did provide coverage, because — and I speculate — likely most people buying an R6 camera are not buying $5k+ lenses. In other words, the economically-aligned lens options would not satisfy the marketing claim. It would probably come down to whether or not Canon could argue that the software transformation engine provided a de facto equivalent to the marketing claim, but were that true then there would be no need to advertise a megapixel count for the camera because AI can remarkably resize any photo to astounding outcome (indeed, a feature of the R1 and yet it still claims a megapixel count). So, I agree that software transformations are fair game for being a part of lens design, but I think that in the case of compensating for unused pixels the camera manufacturers producing lenses do need to be somewhat cautious. Third party lens makers would not be subject to the same issue as they aren't also selling a camera with declared capabilities to go with their lenses.
Put another way, Canon promises on the box and in the brochure that if you buy a 32mp R6 III it will take pictures using its 32mp sensor; Canon is not promising that it will take 31 or 30 or 29 mp pictures that get transformed into 32mp pictures using some software and a specific lens. But the VCM line with its smaller coverage and the software engine being applied is exactly that second scenario. If that approach were to become prolific then at some point someone will notice and make an expensive complaint.