[cookieperson]

It might surprise you to learn that Julia is actively relying on code written in/for R to perform computations. You might be surprised to find out that people who can write R can also write C++ C and other languages of their choosing. You also might be surprised to learn that some of the most vetted statistical code exists in the R ecosystem. If I were someone recruiting for a niche language that had a weak ecosystem, personally I'd take all the help I could get. Can learn Julia with a background in any other programming language in a few weeks... The same can't be said about martingales... But you get to choose your strategy here...

[shele]

And thus we who transitioned to Julia from R and know a bit about martingales and less about programming have long been trying to degrade the core of the language and its principles by making `mean` a Base function.