Original sentence: Doom metal and its subgenres trace their origins from older styles of metal, though much of what is considered "extreme doom" in modern times is heavily influenced by death and black metal.This stems back to thrash metal in the 1980s, which mixed influences from hardcore punk and 1970s heavy metal
Edited sentence: Groove metal.Sludge metal.The heavy metal related side of its influence came from NWOBHM.This stems back to thrash metal in the 1980s, which took tempos and influences from hardcore punk, rather than 1970s heavy metal