If you want to drink the Kool aid, good for you. I will be using my CS6 for along time.
What will you do when CS7 comes along with features that would be really beneficial to you and/or your work?
At some point Canon will release the 1DxS (or what ever) which you will want to own, CS8 will receive the upgrades to allow you to handle Image files from your New Camera, CS6 at some point will not get the Upgrades, this is not new.
Save your Image Files with all your side Car Files etc in TIF, I do, I've never saved my Images in Adobes File Format.
At some point all software will be a similar Business Model to Adobes "Rental" system, I'de say within 5 years there won't be any Software Company offering Stand Alone Products versus "Rental", Adobe are a PIA, but they currently offer the best Software to handle Image files plus a load of other software, On One are about the only Company moving up with a stand alone alternative, and you can bet in 5 years they will be offering their software along similar lines to Adobe.
It's a Business Model that given some Pain at inception will offer a much better more manageable cash flow scenario, for Adobe (and that is the number one priority for any Company), and adobe have a very large Cash Surplus so they can weather initial issues and Play the Long Term Game.
It was only 6 months ago on a different thread on CR, but same Topic when I suggested that given time Adobe would offer a "special" deal on PS+LR and some chap that was an Adobe reseller shot me down harshly stating Adobe would "never" offer anything like that, well, we are 6 months down the track, Adobe have as many of the Pro Photographers and Companies onboard with the "Suite" subscription Model as they feel initially that need, now it's time to extend the Model to get the amateur photographers into the system, it works, and although i dislike admitting it where Adobe is concerned, they have actually approached this from a Business perspective quite well.
PS+LR at 120 bucks a year is a good deal, those that are concerned about a price increase, get over it, the price will go up,what doesn't, any stand alone non subscription model software will also see price increases over time.
If your concerned about file format, save your Files in something other than PSD and that allows you to use other software.
I see the way Adobe approaching this is somewhat similar to the way Apple (plus the rights holders) are approaching Music, you pay a yearly subscription, all your music is available online that you own on your computer, any "Non Original" 9read Pirated) Music is also available in the original Format as long as you Pay the Yearly Subscription, the endeavour is to win over as many of the "Pirates" as they can, it won't work 100%, I'm sure Apple and the rights holders don't expect it to, but if they win over 50% of the Target group that's an enormous amount of Cash Flow in very real terms, it's smart business.
I wasn't convinced 6 months ago re Adobes subscription Model, I've changed my mind, it happens from time to time, and I'm quite Ok with that.