I'm going to risk sounding like an old man for a moment but what's up with the young crowd and energy drinks?

I'm always seeing the teens and 20 something year olda running around guzzling energy drinks. First time I tried one it was 2009 I was at the woodward dream cruise and there was a stand giving out free rockstar energy drinks. I took one cause it was hot as hell out and I was thirsty. It was nasty. Years pass and I get given a free energy drink can't remember the brand. Drank half gave me bad heart palpitations. Can't do the damn things.