OSS4 has vmix as the answer to PulseAudio, which works great. I do believe it is time for the Linux community to abandon ALSA and work with OSS. The developers (dev and hannu on the 4front forum) are awesome. They have written a clean, portable, well-documented API that is great for both developers and users.
It is much easier to support users trying to get their sound working through OSS than ALSA. The problem is that there aren't enough people experienced with OSS to support users. We need more people to join the (counter)revolution, so install OSS4, because the latest release has X-fi support and open Envy24HT/M-Audio code.
I think, it is time for you to wake up from your OSS dream. Future of sound in linux is ALSA.