we have LS libraries where we can store common functions and subs and use it in all places in an application.
there is no equivalent for @formula.
think about an huge application, that needs to be multi language enabled. Today we use a couple of lines of formula code in computed text, items, and wherever we want to show a language dependend string.
what we do is copy and paste formula code around.
It would be better, if we can have only one copy of this code block and reference it from a @formula lib.