DMD Compiler 'switches'

[ric maicle via Digitalmars-d-learn]

On Tuesday, 13 October, 2015 05:43 AM, Ali Çehreli wrote:
> Perhaps those were introduced after the other ones.
>
> I am agreeing with the other posters that we cannot fix the other ones
> because if anyone used = before, it was the part of the path. (Maybe...
> Never tried... :) ) So, we cannot change the syntax today because then
> some users' paths will lose the = character.

Would it be possible to deprecate the old syntax, provide notice to
all D users and make it obsolete after a year?