I started to think Metallica is not in terms of thrash

I listem the first 4 albums pretty much every day and I know pretty much about other bands from thrash scene. Metallica's tone(heavier and thicker) and rhtym(not that fast in every song) is pretty different from them. I think Metallica is so influential they can't completely in any genre. KEA has a speed/NWOBHM type of sound. RTL and MOP are very progressive but they are like %80 thrash mixed with other music elements. AJFA is HEAVY and got that groove sound in it. Thats why Metallica is that good for me.