Be careful with generalizations. I can only speak for myself, and I have left Adobe software almost two years ago. I am very happy with my new workflow consisting of both open source and commercial alternatives.
And I am not the only one who switched to alternatives. I am also aware of a number of colleges that decided to drop Adobe in their classes, and colleagues making the switch for some of their work (for example, dropping Dreamweaver and Flash).
Whether it is feasible for anyone to leave Adobe does depend on the type of work they do, though. For broadcast motion graphics it’s going to be tough going. For video editing easier. For web development it’s a bit of a no-brainer, in my opinion - Adobe’s tools are relatively weak in that department (most self-respecting web coders avoid Dreamweaver nowadays). For digital painting great alternatives exist. Adobe still is quite weak for 3d work. For pure image editing alternatives exist that are on par.
Of course, I am aware I am the minority here.
True - when I run into the situation where I do have need of CC, I will use it. For example, I have to use those applications while teaching students. I do tell them about alternatives, though.
For graphic designers it is difficult to replace Adobe’s applications, if not impossible, since they have to be compatible with the rest of the industry.
That is why I use a combo of both OSS and commercial alternatives. Works very well.
For example, Photoline (beta) can connect with InkScape, allowing me to send layers over to InkScape and to pretty much work in a similar fashion as with smart objects between Photoshop and Illustrator. Photoline<->InkScape actually works a bit better, because I can edit the vectors in both applications, while Photoshop will always open Illustrator for that task.
For development I use Netbeans, which outperforms Dreamweaver in so many areas. Many web devs use it as well (being one of the three most popular choices). And that is OSS.
So again, it depends on the type of work we do whether alternatives can outpace Adobe’s software.
Honestly, Adobe’s Big Four are Photoshop, Illustrator, InDesign, and After Effects at this point. The rest is of more marginal importance, and can easily be replaced, but Adobe’s clever move was to include ALL their software in one mega deal - effectively convincing most people the peripheral CC software is ‘good enough’.
True. Freehand was pretty awesome - it would have been great to have seen it grown as an application. Same for Fireworks. Alas, it was not meant to be.
The good news is that many new smaller companies are working on alternatives. Adobe’s CC subscription-only model DID have that effect. Sketch, Macaw, Affinity,… and others are starting to look very interesting.
And lastly, for 3d work Adobe’s software can be safely switched out for commercial and OSS alternatives right now.