One major point of OP was that the functions defined in operators are faster. Grandparent comment argued that there is a measurement error that invalidates this

One major point of OP was that the functions defined in operators are faster. Grandparent comment argued that there is a measurement error that invalidates this point, since properly defined lambdas (or defs) are just as fast. Of course the point regarding the simplicity of importing a function instead of defining it still stands. I personally wouldn't mind defining those functions as they are very immediate. So from the article I would take only the part about the more exotic "operator".