You know as well as *I* do...
Microsoft can't afford to bite off the customers hands. Even they will initially do this...
They will provide backwards compatibility in Longhorn. Even *IF* longhorn actually ISN'T a code successor to WXP & W2K server.
They just want to make a good stand to get the "kneejerkers" to buy into it lock-stock-n-barrell. After they DIP into those pockets... there will be knashing of teeth... and threats of more lawsuits... then those "Oh shoot" We just HAPPEN to have those compatibility files right here... hehe Sorry for the inconvience.
Blah Blah Blah...