Is D Language mature for MMORPG Client ?

[Matt]

Jeeze, guys, OT? The OP didn't ask about ADA, or exploding 
rockets. I, personally, would think that D is perfectly capable 
of handling a MMORPG client, as it has proven to be very capable 
of pretty much all the tasks required. Derelict is your friend 
here, I'd wager, allowing you access to libraries such as SDL, 
OpenGL (should you go onto a 3D client, maybe for a later game), 
sound libraries and more, while multi-threading and timing are 
handled just fine by Phobos, as are file manipulations which 
includes ZIP archives, and memory-mapped files