Anon for this: Yes, I know that HP still manufactures RPN calculators. Personally, I find I can do more complex calculations with RPN than with algebraic-entry calculators more easily. Once you understand how it works, it’s definitely quicker and easier to do complex operations than to do it with multiple nested parenthesized expressions. Most of HP’s modern graphing calculators have algebraic entry as an option, though. Can’t fight the tide. At least they come in RPN mode by default. Regarding your latter point, yes.
Joseph II: Chill out. I don’t know why it’s called Reverse Polish Notation, but that’s what it is. You’re from the “older” generation but don’t like calculators? Still have your slide rule hanging from your belt? Or do you have a compact one and keep it in your pocket protector?