I have wanted Porzingis to add this shot since he came into the league.
As noted, it takes a certain level of athleticism to get this shot off and hit it effectively. I think Porzingis fits that profile, but not every NBA big does.
The other side of the shot is, as noted, that the game has changed, and that using a sky hook would be situational. It was in Kareemís day too. It would require a big with court awareness and passing ability, rather than a put your head down and force the shot kind of player. Not even elite level passing, just recognizing the double teams and passing to an open 3. Do that well enough and you have more one on one opportunity for the sky hook. A pick your poison option.
There are a handful of bigs that could make this work, but a ďZinger SlingerĒ hook shot* would bring some old school big play back to the game.
* the sky hook will always have Kareemís patent on it, even if he didnít invent it.