It's not really a valid comparison to Vegas vs PPro etc., but as one who prefers Vegas 9 Pro versus other aps like PPro and FCP (that I HAVE to use at times), this article provides some insight.
Yes, I know they're talking about security...my point is that the issue is instructive: Adobe stuff isn't necessarily a solution for those who would like to use other stuff. And as one who uses After Effects a LOT...there's just one thing to say about anything Adobe (even photoshop): Save early, save often.
http://news.cnet.com/8301-27080_3-10417785-245.html?tag=newsLeadStoriesArea.1