I remember that discussion!
The nVidia chipsets were new and these things were just freaking out on AMD systems. MSI freaked just as bad as the Plexy did. It took BIOS updates and a firmware on each drive to get them to work properly on an AMD rig. Even various Intel chip'd boards had some issues. S/ATA was just a new tech not fully implimented yet in the right ways.
Once you think about who makes DVD-R/W's, you can pretty much assume why more aren't out. The guts of an Asus, MSI, and Lite-on are pretty much the same. Plextors, Pioneer, Sony, and Samsungs are the only real standout that I know of that try not to share their guts so openly.
With that, where Plextor strives to have the fastest drive, they adopt S/ATA. Not for speed really, but they're not caught up in Lightscribe or anything trendy like that. Resource gaps more easily sent to study up on S/ATA and how to get your drive to work with it. Sony and the like strive to have their drives in big OEM boxes, and keeping up with the Jone's tricks can leave little left for things like S/ATA...especially when Mrs. Smith doesn't care how her HP's drive is hooked up, as long as she can put a flower on the DVD she's cool with it.
And the real nuts and bolts that I see is that no one really asked for it when this article came out. It was simply "nice...but I still have P/ATA HDD's to deal with". Now that S/ATA populations are up and we're lucky if we still have at least ONE P/ATA port...the issue of S/ATA opticals get a really good visit.
I gotta mention the Plextor and their Compatibility List
though. Just because your specific board is not up there doesn't mean it won't work perfectly. They can't test them all. If your chipset is on the list and works, your board should work too. Same with the S/ATA controller of the same type. Even if it's not, the BIOS' always change as with great firmware support from Plexy.