"Robert Haas" <robertmhaas@gmail.com> writes:
> ISTM that if that if you're willing to admit, even with caveats, that
> PL/perl, PL/tcl, or PL/python doesn't "need" to be in core, then
> excluding anything else from core on the basis that it doesn't need to
> be there is silly.
You are merely setting up a straw man, as no one has suggested such a
policy. Any specific decision of this type is going to involve a
combination of factors, and that's only one.
regards, tom lane