backporting features to D1

[Christopher Wright]

Jarrett Billingsley wrote:
> On Sun, Oct 12, 2008 at 4:48 AM, Walter Bright
> <newshound1 at digitalmars.com> wrote:
>> Bill Baxter wrote:
>>> Python's strategy of introducing new features is the best I've seen by
>>> far.
>>> And with that they have made big changes in the language without ever
>>> creating any major split in the user base, as far as I can tell.
>> Most of the split in the user base is a result of Tango being D1 only (which
>> I hope will be resolved shortly).
> 
> Then address the issues of stack vs. heap delegates.

That is not required for Tango to function properly with D2. It's a 
performance optimization only. A significant one, but no more.