This is a video that I made a while ago and forgot to upload. first part is me ST stacking in 40L and the other part is me playing normaly. In both games i failed in the end but before the fails the games went extremely well.
My pps while ST stacking was 2.6 for a long time while normal(tetrising) only was 2.7 which is a very small difference.

Would it be possible that there could be another stacking method that would be good to use when playing 40L. I mean if ST stacking can be this quick then should not a method where no spins are used actually be able to be quicker than just normal tetrising.