Proof of concept - library AA

[Mike via Digitalmars-d]

On Sunday, 24 May 2015 at 14:13:26 UTC, Martin Nowak wrote:
> Would be interesting to get some opinions on this.
>
> https://github.com/D-Programming-Language/druntime/pull/1282

For my own reasons, a library AA is most welcome:
* separating library features from language features
* making features optional and opt-in instead of opt-out
* modularizing the language and runtime for pay-as-you-go 
implementations

But, if you'll forgive my ignorance, what is the primary 
motivation for migrating to a library AA?

Mike