Ugh, I've just been listening to Gojira the last few days, and now I wonder if they have been using it themselves. Easy for me to dismiss this phenomenon as "that pop music over there". Do you have some examples? Some other impossibly fast metal bands come to mind as well, like Ne Obliviscaris which I explored briefly. I'm a longtime Dream Theater fan, and they've always been very metronomic without assistance, which has sometimes been a criticism of them. They are resistant to outside producers, so I suspect they have not been using "gridification" in the studio. Though, for a stretch before their original drummer returned, they played live to a click track which some portion of fans did not like.