I think the better way to look at it: Is $600 / year / employee enough of an incentive for competitors to step up?

I think lots of software companies( and entrepreneurs) are seeing Adobe's revenue stream and asking "Whats the moat?, What's stopping us from building the top 5-10 Adobe features and charging $300 / year?"

It would seem that Adobe doesn't have much of a moat and that perhaps their software will be commoditized as we move forward.