What if they come up with a new version that changes in a non-desirable way to you? Are you being forced to specific learning paths (and curves) even when you don't want to? I usually am curious and happy to test and learn new GUI or software paradigms, but many are not (rightfully so).
Nonsense. Can you imagine, for example, a video editing software getting its design philosophy changed so drastically that it made people hold off from upgrading, or entirely jump ship to a competing platform...
...oh wait...
Seems to me Adobe has a very short memory. They forgot how quickly people were willing to abandon products like these for greener pastures.