data-default WAS: [containers] Proposal: Change to the Data.Map Monoid

[Bryan O'Sullivan]

On Sun, May 25, 2014 at 12:49 AM, João Cristóvão <jmacristovao at gmail.com>
wrote:

> But my main point here is: should we limit generic deriving of
> instances because some people don't see value in it for themselves,
> given that some clearly do?
>

Yes, of course we should. The whole point of having typeclasses is that the
instances should make sense for everyone. The bar for introducing both
typeclasses and especially automatically derived instances is a whole lot
higher than "works for me, sometimes".
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