Yeah, it's super uncommon. Torx is what you find on most fasteners that aren't Phipps or slotted. I've found Pozi in two applications in my house:
1) An IKEA bed requires it for some screws that self-tap into sheet metal with a machine screw thread. Running them in with Philips is hopeless. Does IKEA supply the required driver? Of course not.
2) Blum cup hinges use Pozi for the adjustment screws. By extension, if you want an actual Pozi screw driver, find a local joint that supplies Blum to cabinet shops.
There are at least a few other cruciform drives out there that you'll rarely encounter:
1) An IKEA bed requires it for some screws that self-tap into sheet metal with a machine screw thread. Running them in with Philips is hopeless. Does IKEA supply the required driver? Of course not.
2) Blum cup hinges use Pozi for the adjustment screws. By extension, if you want an actual Pozi screw driver, find a local joint that supplies Blum to cabinet shops.
There are at least a few other cruciform drives out there that you'll rarely encounter:
https://en.m.wikipedia.org/wiki/List_of_screw_drives