well, back at les.
this is not even kixtart in the way you meant:
"\\Server\Users\" + @UserID + $

you are querying the stuff inside $ var.
if you have vars in strings, it would be:
"\\Server\Users\@UserID$"

or:
"\\Server\Users\@UserID$$"

I don't see any place of confusion here.
except with the old kix versions which you refer to.
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