You seems to find no problem or issue with this new model??? In Photoshop and especially in Lightroom your put a tremendous amount of work in parameter and metadata. I think everybody understand you will have the raw file and the final result if you stop renting but you will in loose the ability to use this working data in the future.
What is your opinion if Adobe in a few year move to rent model only with Lightroom? You have to pay each month forever or loose all your parametric work and metadata... OK with that?
What if Adobe triple the monthly rent or stop evolving the product and you still have to pay or loose all your work? Or you get into financial trouble and are not able to pay. OK with this model?
The key difference between this and other rental models (like a car) is in this case you loose the ability to enjoy all your working data. And you have not the option to buy. And it's no cost involved for Adobe if a user continue to use the existing version like it is with a car. So please don't compare this to a car hire.
I essentially agree with you. However, LR going rental only would be much worse than PS.
When we finish processing in PS we save the image, hopefully as a TIFF. If we lose PS, other products will be able to open and work with the TIFF.
With LR, the adjustments are just stored in the catalog (and XMP/DNG if you choose). There is no "rendered" finished product. This is only created if you print or export...and most instruction is to not store the end product as it can be recreated if needed. If we lose LR, the XMP is still there, but the software/algorithms are not available to rendered what we created.
While I might accept PS CC, LR CC would probably drive me to buy a MAC and Aperture.....disappointing as that would be to me....actually, further thought....it would be devastating...!!