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Am 28.06.2013 20:01 schröbte Tim Hill:
It would be amusing to speculate how people would react if Lua had
always had "empty" and I posted a suggestion that it should be removed
as being unnecessary, since there were obviously so many workarounds. :)

One example of a recently removed "policy" feature is the module function. Obviously removing an existing feature produces much more heat, because people have come accustomed to it, and there is code using this feature which will break. Fortunately the Lua authors never had to remove a complete type yet.