Another 44-year old here. I suspect that their relevance to the current generation is probably about similar to Black Sabbath's on ours. All the really important Black Sabbath albums came out long before I was listening to music and while they continued in various forms through the '90's and beyond and were worth seeing live if you got the chance, they weren't really putting out new music that I cared about. It's hard to imagine heavy music without Black Sabbath or Metallica's influence.