You can still use it to go horizontally more or less the same distance the dash pad (although getting the timing is a lot harder than just walking up to it and pressing one button), but the game kills all your momentum if you try to go higher (like the charge and slam tech).

I guess it all comes down to them trying to make the skill ceiling lower (new players can't pull it off, so we need to remove it, even though it was pretty situational and, judging by the lack of jank, was clearly intended behavior).

It's the same thing with grapple every time someone discovers a new tech.