DirectX 9 to 11

You noticed, well you should have that I left out Direct X10. Here's the Question? Why did Direct X10 get left in the dust while theirs still support for 9c? Direct X11 is the new standard, but why was 10 so short lived? Bad coding, hard to program for?

Cause 10 sucked? lol, not sure. 11 seems to just "Hammer" cards though. L4D still looks good to me.

Because the xbox 360 is dx9 and it's easier to port that way.

Short answer compilations:
- The technical capability of DX10 compared to DX9 doesn't gain you too much, but from DX9 to DX11 there is enough to justify a shift.
- Game engine developers viewed DX10 as just another part of Windows Vista to be skipped, but now that the API has matured into DX11, people are jumping on board.
- By the time game engines were very well tweaked and optimized for DX9, DX11 was in beta, so why not learn the newest? DX10 imposed some pretty strict new standards for veteran DX9 shops, but everyone realizes if you want to make games supporting the newer GPU features you don't really have too much a choice but learn the new API.