AMAZING ALBUM! Can't believe I didn't check these guys out sooner!
https://www.youtube.com/watch?v=QM_Xl7WyA7g
https://www.youtube.com/watch?v=usnxOPLsOYI
https://www.youtube.com/watch?v=oZX3xz3jj20
https://www.youtube.com/watch?v=whH-VOiO6HE

>>127494817
To add onto this with an actual example, with thrash specifically the lines can get incredibly gray; so what I usually go by is "If it's even slightly heavier than Slayer - Angel of Death, it's no longer related to traditional metal and has gone fully into extreme metal territory." While not 100% precise (that's impossible), this is the best method in my experience.

>>127494936
>Is stuff related to those genres allowed if it came out before the 90s?
No.
>Would this be allowed in the thread?
Sure, why not. This song sounds perfectly fine to me.