I've been wondering about the recent change myself. Considering that it's not election season, it seems prudent to wonder about the sudden flood of unverifiable identities in discussion forums. Hard to tell, but necessary to wonder.
Dave McAllister has a single-screen summary, and I've got some background history, both with plenty of links: http://blogs.adobe.com/open/2010/02/following_the_open_trail... http://blogs.adobe.com/jd/2009/07/opening_the_flash_file_for...
The current outpouring of negativity over Flash is in no way a continuation of past trends and does not represent any sort of culmination of widespread customer anguish over Adobe's (perceived or real) failure to address paying and nonpaying customers' needs for a stable, performant, secure way to create interactive media.
The comparatively rapid progress of <canvas>, <video> and <audio> in the past few years versus the rest of Flash's lifespan should in no way be interpreted as a sign that people have become fed up with being dependent on a badly engineered, unreliable, overpriced piece of technology from a self-sabotaging software juggernaut.