Good topic here. Noticed that too. I used to think I was one of the few people who were into flourishing, then I see people performing XCM everywhere. What's more is that many are already so good at it. So good in fact that I actually feel like quitting.
I find flourishing quite hard actually, part of the reason why I put it off
for now and concentrate more on magic.
For me, magic is going to get me more mileage, or rather, I'd go further with magic than flourishing. I myself would rather be entertained by disappearing objects than packets being thrown around. Don't get me wrong, flourishing impresses me a lot too, just not as much as magic does. I always though of my "flourishing" as an added bonus or accent to my magic. I use it in tandem with magic to make it more flashy and appealing.
The way I see it, magic is a bit more broad and covers a whole lot more than flourishing. What is the point of flourishing anyway, other than to juggle cards, string them well and to make it smooth and beautiful? I say that not to bash XCMers but to stress the point that magic can entertain on a different level. It's not just skill, there's psychology, dexterity, presentation and others.
There was a thread back then that talked about "old school" and "new school" magic. You say that flourishing attracts young ones because it's cool, but I can consider the new breed of magic nowadays to be equally cool.
C'mon, with effects like Distortion, Flare and many others, you'd look just as good doing those as you would performing flourishes.
Flourishing and magic have their own style and appeal. As such, different people will get attracted to either one of those two and different people will find either one entertaining. As usual, this is just my opinion.