Just like the terser iota, it's more elegant and easier for newer users. The fewer symbols there are in code the easier it is to parse for the user (up to a point). It's also more consistent with iota. It also means that a foreach that iterates a function return value can be written in the same manner whether it returns an array or an integer, again more consistency.
It would be even nicer to be able to write for(i;5) and have it behave as foreach.
