If WR uses glitches that are not possible in the most recent update, will it become obsolete? What are the rules regarding that in speedrunning?

I've been practicing it for like an hour now, i just don't understand it. I've watched when NicroVeda's did it in WR. I am not using a pro controller. I understand that you have to tilt, left then move the control stick in the same direction, but its just not working :(