Remember the subscription is a one year contract with early termination fees
I remember Master Suites used to cost about £2000 and upgrading to the latest version was about £500 (every year). Personally, I find Creative Cloud is a far better deal as a package especially at the discounted price. It's one of the few subscriptions I don't mind paying for it as I use it for work.
Photography pack is now "only" £8.32, down from £9.99 per month... I too morn the buy once and pay again when you're ready :-(
The reason Adobe has gone to a subscription model is to manage revenue. Annuity payments are much more welcome by investors than troughs and peaks of perpetual product transactions. The product remains "updated" and supported and infrastructure is usually provided by the vendor. However, in reality, it increases costs for the user significantly. You have no other choice but to keep subscribing, even if you have no need for support or newer features.