> Why is nobody complaining about not being able to use the third > creation 
> argument directly withing a message? What's the fuzz about the
> $0?
$0 isn't part of the argument vector. It's a unique id automatically generated 
for a patch/abstraction which the user happens to access through a dollarsign 
variable.

That locality hack doesn't require that the unique id be fetched by an unused 
dollarsign arg. For example, you could reserve the keyword "let" such that a 
message box with "let token2" would get converted behind the scenes to 
"1003-token2".
When users for a decade have said they wanted $0 in msg boxes, they mean that 
they want to use Pd's notion of send-symbol locality inside message boxes. They 
want that instead of manually querying  the value of a reserved dollarsign 
variable and sending that value to the relevant message box in order to get 
"let" behavior.
Also, since "$0" is already being used for this purpose it doesn't make much 
sense to try to also get "$0" to refer to the selector. You'd end up with 
inconsistent meaning where it fetches the selector in msg boxes but not in 
object boxes. Plus you can already get the selector of an incoming message with 
[list] whereas you cannot get an abstraction's selector (which would be handy 
for error reporting). So adding that inconsistency would only duplicate 
existing functionality without adding new functionality. 
-Jonathan

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