You may know some of them, Papa Doo Ron Ron or Surf City All Stars, or whatever they choose to call themselves. Ex-members of old surf music acts. Dean Torrence or David Marks might appear in one of those line-ups, if you are lucky.
Personally, I am all for it. Many of the bands from the 1960s are history now, so for surviving members, it's perfect. They make money, we get to see them. Should Dean Torrence just have retired after Jan died? Of course not.
I've even got one or two CDs by such bands.