I think the arguement of all your work and files being digital garbage if you don\'t pay the monthly fee to Adobe is hogwash. The camera produces the files. You still have them and the reader the camera manufacturer gave you with it. The work you\'ve processed through any post processing software such as Photoshop, Capture1 or whatever is finished work. It\'s done and over with.
If all you do with Photoshop is use it with ACR as a raw developer, then yes, but Photoshop isn\'t primarily a tool for photographers, despite the name. It has a very wide range of features for content creation and heavy editing/processing that is completely separate from existing RAW files, the use of which often results in layered PSD files which do become quite useless without Photoshop.