It's a typo, I meant a * b. I agree on RPN, that was the point I was trying to make. RPN is more powerful, but is stateful and uses a rather complicated and un

It's a typo, I meant a * b. I agree on RPN, that was the point I was trying to make. RPN is more powerful, but is stateful and uses a rather complicated and unintuitive form of state (a stack). In my experience it's not true that people find it more intuitive to work with arbitrary mutable state of the kind imperative programming languages traditionally have.