Canon should free up their proprietary tech and IP because members on Canon Rumors want a wider and less expensive lens selection. Ok.
Every so often we need a few lessons on 'JBYWIDMCWDI'
(Just because you want it doesn't mean Canon will do it)
On the other hand, if they don't free up their proprietary tech at least to the extent of allowing third party lenses (assuming that the lack of third party lenses is actually due to IP issues), do they risk losing out because people choose not to buy into the Canon system at all? Canon will have huge amounts of market data and smart people working out how to maximise their profit, so I'm going to assume Canon knows what it is doing from that point of view. However, for what it's worth, as someone who has shot Canon for about 20 years, I'm very jealous of the lenses availalbe for the Sony system and about two years ago Sony became my default recommendation when anyone asked me which system they should go with. I say default recommendation, as it always comes down to what the person wants to shoot, and perhaps what lenses they already own. (For example, if someone has the use (and budget) for the 28-70 f/2L, that might be a reason to go with Canon.) But for many people, I think the Sony system offers much better options and value than the Canon system (which in the main offers lenses which are either large, heavy and very
expensive or reasonably small and light but underwhelming at least in the 24mm to 100mm focal length range). And all the people I know who have gone with Sony (and I accept that is not many in the context of a worldwide camera market!) have been very happy with the choice. If Sigma, Tamron, Samyang, etc, were producing RF lenses (yes, I know Samyang has made a few), I expect I would still be enthusiastically recommending the Canon system. As things stand, I don't feel able to do that.
I know Canon Rumors is a pro-Canon website so what I'm saying may be unpopular, but since the introduction of the R system, I just cannot get excited about what Canon is offering, as optically fantastic as lenses such as the RF 85L may be. I haven't bought into the R system and I have no plan to do so. The existence of third party lenses for the R system would help Canon sell me a camera (and no doubt some lenses, flashes, etc, over time). The question is, how many people feel like I do, and how much (if at all!) does that hurt Canon's profit? I can only assume Canon is pretty confident the answer is not enough people to worry about.