There is something really childish and weird about it, particularly now that drill's usurped it. It's almost like CBBC or something.
I wonder whether there's any correlation with how games have developed. The people making grime grew up on much less realistic games and the sounds are often woven into the music, all the blips and bloops, it sounds like Sonic, Mario etc. Nowadays the games strive for realism, grit.
'2step vortex' is a much cooler name though.