I dunno what soul keeper is talking about, adobe works just fine for me and only crashes when I bring the computer out of sleep for some reason(if I leave a website running it up)....
Anyways, I attribute the slow implementation of HTML 5 as "needs" and training issue.
It's like reinventing the wheel... HTML works, why mess with it, at least right away.... so, that will put HTML5 on the backburner in a production environment for now.
Plus, now all these programmers need to get trained up on HTML 5... taking away from valuable production time.
Personally, I don't see a reason to jump on HTML 5. I've seen it in action on various demo sites and it don't look no better/different/faster to me than flash or something else... Prolly because internet apps don't have as much adverse affect on system speed than they did in the past...