Fully transitive const is not necessary

[Walter Bright]

Lars Ivar Igesund wrote:
> Walter Bright wrote:
>> Invariant strings have turned out to be a resounding success (and I was
>> very, very skeptical of that initially). I suspect that more and more
>> programs will gravitate towards using invariant as people get more used
>> to the idea. I know my programs will.
> Do you have any references to this resounding success?

It's success in other languages for one, and not finding any problems 
with it when using it in D for two.