Over the past few years, I’ve become more accustomed to going to see reunions of bands I cared about in their heyday. It was one thing for me to see, say, a Black Sabbath reunion (though I totally liked Sabbath when I did get to see them), and quite another for me to see bands that actually meant a lot to me, and were around, when I was younger. It’s weird. I can’t tell whether bands have always gotten back together like this, and I just didn’t realize it because I was young, or whether this is …