1717171717171717 type stuff are totally drills
I've never heard anyone refer to that as "stream", I think stream usually refers to a passage consisting entirely of single steps that tends to be at a steady rhythm and isn't a drill or jackhammer (Stream is one of the points on the groove gauge in DDR, I think, so it's a holdover from that game; I think that it specifically measured the average arrow density of the song, but it's also used to describe stuff like that)
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