The 'subscription plan' assumes the user will always be needing to get the latest software version in order to support the most recently purchased versions of Canon and other brand dSLR, AND that one needs the full blown Photoshop...but if that is NOT a valid assumption, the subscription model is unnecessarily expensive!
I have a Canon S95 as my latest camera...going on 6 years now. Under the current CC subscription concept (if it applied for the last 10 years), if I had to pay $10 a month for 6 years, I will have spent $720! If I did the same for the entire period I have owned my 20D then 30D then 40D, I will have paid $960!! Instead, the 'buy as you need' upgrades of LR have cost me $300 total: (coming to LR from RawShooter) $99 each for LR1, LR2, and LR3 -- after which I haven't purchased any newer model cameras forcing the purchase of either LR4 or LR5! Under the discrete version license purchase (not subscription) it would -- at MAX! -- cost me $500.
Gee...that seems to prove the point of the opening paragraph of this post, "the subscription model is unnecessarily expensive!"
OTOH, if I had been paying $300 per upgrade for Photoshop (which I do not need or use), even $960 beats $1500 for Photoshop upgrades during that same period!