Well, 1986
I'll stop my "series" here, as from now on the era of classic Metal is slowly dying.
Of course, until today, there were some great albums being released. Especially in the 2010s, there was something like a "New wave of traditional Heavy Metal", which still goes on.
But since the mid-80s, there wasn't such a huge development anymore as from 1970 to mid 1980s
I'll probably drop one or the other album still if it's the release year
And as always, if anyone needs some "insider tips" for classic Metal, Thrash etc., you can always dm me
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