but, with all due respect, explaining things the way you did, it was a cretin question. Why? See:
1- You complain about bands that just copy the previous one;
2- You say that, even thou we still praise those old bands, they are dying.
3- You state the evolution of the style.
But my man, if others can´t imitate the band, of course, by this logic, every single band/style is dead by the end of itself (break up, death. etc.)
I believe that praising is what keeps the music alive, and seeing some aspects of those old ones in the upcoming bands.
I personally, would love to die by the age of 80 and still seeing some power bands around...
In fact, every band copies a little...they just add a personal touch...while some don´t even do that. If you don´t accept that you will come to the conclusion that Music is finite and saturated. (which is a blasphemy to Professional Degreed Musicians, but it ain´t my case
)
What if Helloween couldn´t copy some aspects of Iron Maiden? I believe it´s all about relating yourself to the musical enviroment. There´s no dead metal. Want an example of a dead style? Disco. I haven´t seen any bands around, have you?