What can I say? Other than software, metal (and glam metal in particular) is one of the things I'm most passionate about. If I had a shred of musical talent, I'd probably get out of the software business and join a glam-metal band.
Sadly, I am pretty much tone-deaf and couldn't carry a tune with a wheel-barrow.
Well that would explain your clear bias. This sentence applies equally to your list of glam metal bands: "I mean, sure, STP or Pearl Jam still have their fans (what band doesn't?) but nobody really gives two shits about grunge anymore."
The claim that Motley Crue and Def Leppard are still relevant in modern music culture is pretty silly.
You may well be right! This is one subject on which I won't even pretend to not be biased. But, being as this is HN and not "music fan news", I won't say anything more on the topic. I wouldn't have said anything about it, but I was in a playful mood this morning and felt like having a little fun. :-)