How To Choose Your Calculator: Texas Instruments BA II Plus vs Hewlett Packard 12C

RPN is an EXCELLENT form of working for computers (and calculators too…) that helps you a huge maintaining control of results in the development of your calculations!.
Unfortunately, at the moment, I couldn’t say PHYSIC calculators with the RPN mode, outside the HP brand!.
I ask. Why can’t implement this in Casio (for example), or the, hear present, TI BA II Plus?.
HP 12C is a G R E A T calculator, used by bankmans and informatics (like me…) over decades!!.

Zee, we have a condensed 15 minute guide to using the TI-BA II plus:
https://www.youtube.com/watch?list=UU8DNfSlObTQsdz0rOWB2-0A&v=Ehchb6Zvag0

Pardon: “I couldn’t SEE…” (not “SAY”…) “…PHYSIC calculators that provides RPN, other than HP products!!”.
But… my model of HP 12C is “Platinum edition”. I don’t know if it could be admited in CFA exams, if certainly are too “extremely strict” that the post says…