[tromp]

> Not sure what the rationale for commas in lists is, though.

Well, you need some separator, and spaces won't do since [x y] has x applied to y.

[dasmoth]

Good point.

Although could, in principle, make space-between-list-items higher precedence than function application. E.g.:

    [x (func y) z]

[mrkgnao]

But how do you write a list with only one element, x (func y) z?

[dasmoth]

[(x (func y) z)]