It's nothing new, Cakewalk seems to mostly come up late on the list of supported DAWS for various audio things.
Though I think it's very gradually changing . . . as more Sonar users spread the word, and what Cakewalk is doing in the audio world gets more attention, just a matter of time, the best things eventually rise to the top. I'm sure they could always do more marketing in the educational world, as well as to professional studios, but the history of DAWs is very set in place, all the major DAWs have previously picked their dancing partners, and it will take time to break it down and for those changes to come about . . . and, if Cakewalk can really pull of the MAC version, it's a whole new game.