Why base 4.4.0.0 does not use default signatures extention (new in GHC 7.2)?

[Bas van Dijk]

On 22 September 2011 06:18, Maciej Marcin Piechotka
<uzytkownik2 at gmail.com> wrote:
> While the Functor f => (Pointed f =>) Applicative f => Monad f is still
> discussed the default methods would be a step towards the goal.

I like it. It's indeed a good step towards:

http://hackage.haskell.org/trac/ghc/wiki/DefaultSuperclassInstances

Why not formally propose this?

Regards,

Bas