Nice discussion, guys!
Personally, my views echo bta's in this debate . . . the majority of the blame for the current situation of the audio market is from a lack of anyone else willing to help with development of new standards . . . and what were considered "de-facto" standards having been removed from Vista.
Again, as well, it's not just Creative who've had numerous issues with software and hardware problems in Vista - both ASUS, Auzen . . . even HT and Razer have had countless issues with the OS. The reason it's not as prevailent - these manufacturers don't sell as many cards as Creative do, their market share is smaller - so the overall number of users with problems is much smaller than with Creative . . .
but, it's funny, all manufacturers are having the same problems and issues - there's nothing really inherent to one brand . . . loss of multi-channel support in apps, loss of Dolby output, downsampling channels, crashing with more than 4GB installed memory, loss of playback with more than 4GB installed memory, etc. . . . these problems aren't found with just one audio manufacturer . . . but with ALL of them.
Which, naturally, leads me to assume the biggest problems is with the OS - not the manufacturers.
In regards to EAX . . . EVERYONE has free access to the majority of affects and processing calls available with EAX 4.0 (believe it or not) . . . it's called OpenAL.
OpenAL is fully compliant with EAX 2.0 standard . . . but the API includes the vast majority of processing calls found with EAX 4.0HD/5.0HD - how do you think the ALchemy software is capable of translating EAX 5.0 calls into something OAL understands? OAL even includes support for X-RAM tech (which, as far as EAX is concered, is only available with EAX 5), multiple environments, environment occlusion . . . granted, OAL doesn't match EAX call-for-call, but there's still a good amount of implimentation there . . .
the problem is, IMHO, no other audio manufacturer has gotten off their ass to help out with development of OAL. Kinda funny that this free API which has essentially become the backbone of the gaming in Vista, is being developed and funded primarily by Creative.
On top of that, perhaps if there was more support from the gaming communtiy . . . but, developers tend to approach game audio more as an after-thought, than developing it alongside their title/engine. Although, games where a lot of focus is placed on audio - you can really see how it gives that final polish to the product . . . think FEAR, Thief, Crysis . . .
Thing is, as bta pointed out, the audio market has pretty much ground to a halt since '05 and the release of the X-Fi.
Creative keep pushing the performance envelope with the X-Fi lineup, but there are no other manufacturer's competing in this niche . . . ASUS is continuing to use their AV100/200 DSPs, which is really just a slightly tweaked C-Media CMI8788 (which is just as old as the X-Fi APU . . . going on 5 years on the market, now). ASUS have been repeatedly taking the same cards, slapping a new DAC on them, marketing the higher SNR rating, and repackaging the cards . . . Auzen have gotten lazy as well, the majority of their offerings recently have been borrowing the X-Fi APU from Creative . . .
But, you see . . . evidence that the audio market has stagnated: Creative have been using the same APU since the CA20K1 was released back in 2005, there has been one update to the APU (CA20K2) which only brought in native PCIE support. C-Media's last noteworthy release was the CMI8788, brought to market in late 05 - early 06 . . . both leading audio processing solutions have seen NO MAJOR CHANGE OR UPGRADE IN 4 YEARS!!!