I do not claim to have invented this tech, and it existed in .9b, but I haven't heard of it, nor does it have a page in the wiki, so here goes.

While dashing, or in initial dash animation, you can press left and right at once. You will continue to dash, but your net input direction is neutral, as if you are standing. This means you can jab or neutral B out of dash.
This does not work during your initial dash. Once you finish your attack, if you are still holding left and right, you will begin your initial dash animation in the same direction you are facing. Also, I use autodash, so I don't know how a dash button affects this.
If you do a Falcon Punch with this method, it will always be reversed.

Of course, this isn't particularly groundbreaking since we have a one frame dash cancel, but this way is easier, especially in lag, and sometimes that one frame matters.

nice tech
but why the jojo reference
i dont mind
but why

dunno

Actually, someone made a post way before Beta's official release, I don't remember who, though. I had forgotten this tech, but thanks for the reminder.

Yeah, the tech's name is Multi-Directional Input (MDI).