At the risk of upsetting folks . . .A possible problem with too many "young" high-enery bands is that they start a set flat-out, and leave themselves no-where to go. Possibly trying (and failing) to out-Bothy Band the Bothy Band. And after 45mins of them they leave you feeling you've heard it all befor (unless you're sufficiently "tanked up" first!!) From memory, there was more variety and contrast within a Bothy set or recording than those "new" bands can manage. And that doesn't seem reflected in what's been said so far.
On the other hand amongst the "new" bands there's those with the new-age whispyness of Clannad (a find band up to and just about including "Harry's Game")/Enya. I don't know how I'd feel after 45mins of one of those - there's no way I'd have lasted that long . .
G.