Why dj's use to have epic 6+ hour sets, but not anymore?

Dzone

I just listend to part of a set that was almost 7 hours on youtube. It was part of a record 12 hour set for armin van buuren. It was recorded back In 2002. I remember hearing dj's used to play really long sets like that 10+ years ago. Man they sure had endurance back then.

 

Nowadays every set I ever come across is always like 60-90 minutes long. That's crazy low compaired to what they used to do. I even remember Markus Shulz making a coment of something about used to do 6 hour sets, but now only does around 1 hour sets.

 

What has happened to trance over the years. They used to be a very long epic journey, but not anymore. Have they just gotten lazy or what?