True, but it's probably the next major tech I should learn as Squirtle, and I want more mixups as my approach game has gotten kinda stagnant.
I would argue that every squirtle player should first make sure they have a near-total mastery of different ways you can utilize wavedashing before ever trying to get good with hydropivoting.
In squirtle's movement patterns, every frame of the shellshift animation can be jumpcancelled, which means it can be wavedashed out of. If you wavedash out of the first frame of shellshift you'll do what's called a wavesling, where the 4 frames of jumsquat boost squirtle a significant distance (in only 4 frames, it looks crazy) before the wavedash, and the distance can be contrary to the wavedash as well as the same direction, allowing for some insanely difficult to follow reversals of direction.
Perfect wavedashes with inputs on the first frame of stand wait can be pretty much as useful as hydroplaned moves, especially when considering it takes 14 frames (as opposed to 15-20 to get to the correct frame in SS to hydropivot) with jumpquat(4) and landing(10) to begin a move while still sliding very fast.
Wavedash f-tilt is one of squirtle's best approaches, and can be angled down to try and force knockdowns to start tech chases.
Wavedash jab is extremely effective at jab-resetting due to it's massive threat range, pretty much any missed tech on the main stage can be reached in time to reset with this.