"... once Metallica stepped up the pace, everyone else followed suit. Listening back through modern ears, it's almost like revisiting those first three Ramones records-you know this music shaped the world you live in, but since so many artists have added extra levels of intensity since then, there's no way to re-create the sensation of how revolutionary the music was during its time. Today, the sequencing sounds a little more abrupt, and a surprising share of the riffs fall closer to traditional Maiden/Priest-level heavy than outright thrash. But of course, there are moments-the crunching chugga-chugga riffs that propel songs like "Whiplash," "Metal Militia," for instance-where Metallica's sense of purpose crystallized, and it's easy to see why the band became known as such a genre-defining force right out of the gate".