OKay, Harden has the Stepback 3, and now Doncic et al. are imitating that.
Scurry, Trae and others have the Long-Distance 3.
I'm waiting for someone to unleash the Turnaround 3.
I use it now and then in games and can make it as well as a regular 3 (I prefer rhythm with my shots). Now I'm shooting on the sub-NBA intl 3-point line, but also I'm not as big and athletic as NBA players.
It's a tough shot to contend with, usually taking the defender by surprise. And I can do it on a quick catch-and-shoot.
Closest I can recall was Glenn Rice doing it in college from the top of the arc. I'm waiting for someone to break out the 3-Pt turnaround.
I won't even get into the 3-Point hook shot, which is not that hard if you have some touch ...