An alternative - a partnership with Canon on Nikon where they would build a shell around the iPhone that would accept DSLR lenses, and build an iOS app to have

An alternative - a partnership with Canon on Nikon where they would build a shell around the iPhone that would accept DSLR lenses, and build an iOS app to have all the DSLR features, with deep integration (like panorama, could make use of the other lens, AI, etc). They make more money on lenses anyway, let apple sell razors while they continue to sell razorblades. Furthermore, the case itself would cost $100-$200, which coupled with the phone would be > $1000, while the "normal" DSLR sensor shell is already about $600, so it still leaves room for both products. Also, it would even lower the barrier to entry to purchase DSLR lenses for current iPhone owners, which would increase lens sales. Assuming it works from a technical perspective, I don't really see a downside with this business model.