So back to metal, regardless of where you were geographically, one who was into metal back then can better speak to the fans reactions (IE - saw the impact in how people literally talked about the album, saw the impact on concert attendance, etc), than someone who reads online that the general consensus is that "well that album sucked, so it ruined Judas Priest"
Ok, now we're getting somewhere!!
So, what you're saying is, for other regions that you didn't have immediate access to, you had to rely on other people's opinions. You read it in a magazine, you got the info in a letter from a buddy accross the country, whatever.
How is that any different from the youngins? Read it on the internet (or, shit, still in a print zine), got an email/text message from a friend...
It's the same thing. Different time periods.
It's not like the younger generation is the only one who thinks they know everything about the past, or how things 'really were'. You even see it in this very thread between the older guys. Some see the past through rose-tinted lenses and whatnot. You guys can't even agree on what it was like!
The difference is, even though I wasn't there, I still can see what things were like, using many of the same resources people back then did. The Slayer/Metalion zine compilation. Zine scans. Old interviews. Old press releases and pictures. Old live recordings and video footage. Chats with people who went to shows then and still go to shows now. 80's metal isn't some mysterious holy grail.