> that seems obvious to me:
> 
> it's ' ,' that joins the items in #('a' 'b' 'c'), acting as a 
> glue, while the expression
> 
> #('a' 'b' 'c') join: ' ,'
> 
> does not make any sense when you read it.
> we do "small talk" after all... not "reverse talk"
> 
> 
> just my 2 cents
> 
> Stef

I see it the other way, I have an array, I want a string, I ask the array to
join: itself on some delimiter, it's the array's data, therefore the array
needs to do the work.