Graphics is no longer Apple's only "core market". The purchase of NeXt has brought a lot of Unix fans into the fold. So you have the artists and designers of Classic vintage as well as a whole generation of people that don't feel like writing a batch file full of gotos when they want to shell script on desktop box. Apple's niche is a huge swath of the most influential members of the information tech community. Photoshop isn't going anywhere, and niether are the masses of new converts Apple is gaining each month for a variety of other reasons. They don't need to buy Adobe for this to be the case.