Quote:
Originally Posted by AmongstTheRiot
IMO,mainly their commercial success, expanding the audience, etc.
They also got Dave Mustaine writing alot of stuff that would later be used for Megadeth's early albums (Mechanix for instance)
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More than just their commercial stuff, they showed that thrash groups if they had the ability, should be writing longer more complex material, and progress the thrash sound beyond the confines of hardcore thrash fans, in order for it to survive as a leading metal genre.
Therefore, we had on one axis Metallica showing where thrash could go, at the expense of not really being thash anymore. On the other axis were Slayer, who despite some variation (nu-metal influences on one album) never ventured too far away from their core thrash sound.
Around the late 8o's most thrash groups had started to slow it down anyway and a number outside the big four had put out albums that were heavily influenced by doom metal. Overkill "Years of Decay" Testament "The Ritual" Exodus "Force of Habit" Being three great examples.
When thrash metal had lost its flame around the early 90`s, groove metal stepped into the void as the economically viable metal alternative.