Originally posted by SlyBoots
I noticed this comment at GD>
"Gabe made it quite clear that Valve has totally scrapped all DX8.1 coding for DX9 and encouraged other developers to do the same – he was very adamant on how superior the results of it are and how easy it is to use."
the sooner the better
For the record DX8.1 would be refering to PS 1.3/1.4 support