It will be interesting to see whether the next iteration of LR includes a standalone (perpetual license) LR 7 version, or whether Adobe will push everyone to the subscription CC model.
Jeff
IMO it would be a mistake to push everyone to the CC model. I don't think it costs Adobe much to keep the perpetual model, it is after all the same software with a few bits disabled for the perpetual version. Paying for each update instead of subscribing might make a few bucks less for Adobe, but it offers an enticing entry point for hobby photographers who don't need Photoshop. It also makes sure that no competing software ever reaches a wide audience.
If it becomes subscription only, I would have a hard time promoting its use in my local photo club. It would also alienate all customers who believed in a prior promise never to cancel the perpetual version.
Anyway, we will know what happens by the time ACR 10 is released, as Jeff Schewe said above.
Cheers,
Fabien