Do we need a time-out in D evolution?

[Walter Bright]

Daniel Keep wrote:
> I've been thinking about it, and I have to agree with both camps on a
> lot of their arguments.  const by default is safer and clearer, whilst
> mutable by default is obvious and more consistent with how we're already
> writing code.

const by default is too big a change, and I'm reluctant to do something 
so far out of the mainstream of these types of languages.