backporting features to D1

[Walter Bright]

Aziz K. wrote:
> I got an idea, what if you backported some stuff from D2 to D1 
> (obviously not the const system) and made those features only available 
> when a switch on the command-line was turned on, for example -v1.1? 
> Ought to satisfy both camps, the conservatives and the reformers. 
> Whaddaya say?

I've dealt with that on C/C++ compilers for years, and it's an unending 
testing and configuration nuisance.