First of all, D2 is not mature at all. It's like asking "Is C++0x mature enough?"
Secondly, lots of people won't ever switch to D2, even when it's done, because they feel that it adds a lot of feature bloat for very little gain.
Secondly, lots of people won't ever switch to D2, even when it's done, because they feel that it adds a lot of feature bloat for very little gain.