i pretty much listen to all of those mentioned still - the majority of those are in my cd case in my car right now. i am with you in that not much has come out in the last years that is able to rival the genre that these fall into. i myself have seen a switch to the hardcore - hatebreed, unearth, all that remains and more recently august burns red. as i said though, im very content revisiting my old gems daily bringing back memories of seeing them live. ive been quite fortunate to check most of them off the list.
between family values tour and ozzfest (both from '98) i was able to see many repeats (tool, limp bizkit, soulfly) but also some newbies (snot, ultraspank) at the time
i figure if it aint broke dont fix it - thats my musical collection. the industry right now is broke - not me