I agree with Don's remarks. aD has its vision and will keep going with it. I just want to add a comment about the upcoming version of ACS for Apache. What I heard from an ArsDigitan is that Robert Thau is creating a mod_aolserver for Apache that will recreate the Tcl API inside apache. I think Thau is using mod_tcl (which has been available for quite some time) as base for his endeavour.
I don't know to what degree mod_aolserver will be compatible with AOLserver but I doubt it will have something like ns_schedule_ will be available.
This will bring many more religious Apache fans to the pool of aD's customers.