Maybe we shouln't equate the stock price of a company with that very company. But I append some links so further my POV:

Flash In The Pan: Historical Lessons Of Adobe's Macromedia Acquisition https://adexchanger.com/data-driven-thinking/flash-in-the-pa...

Adobe accused of software monopoly (not by Apple) http://www.techworld.com/news/apps/adobe-accused-of-software...

The Real Story Behind Adobe’s Failed Mobile Strategy http://www.businessinsider.com/the-underlying-story-behind-a...

Adobe recovering from massive Creative Cloud failure (one of several) https://www.engadget.com/2014/05/16/adobe-recovering-from-ma...

The Agonizingly Slow Decline Of Adobe Flash Player https://www.fastcompany.com/3049920/tech-forecast/the-agoniz...

And, finally, some commentary on the nature of Adobe's stock rise: http://www.forbes.com/sites/petercohan/2014/02/28/why-is-ado...

Adobe Systems Inc. May Be Wildly Overvalued http://www.fool.com/investing/general/2015/09/29/adobe-syste...

Adobe Is Extremely Overvalued http://seekingalpha.com/article/2675425-adobe-is-extremely-o...

Adobe: Overvalued Despite Improving Profitability http://seekingalpha.com/article/3989440-adobe-overvalued-des...

But to be clearer, let's rephrase and say that "Adobe the company has had a rough decade".