I think this is excellent point. People are brutal. And deserved or not, Sonar already has a reputation problem among users of other DAWs.
Even though this will be only a very early alpha version, every feature that is enabled absolutely MUST work perfectly or word will spread and no amount of marketing or user testimonials will undo the resulting perception that Sonar on a mac doesn't work and therefore shouldn't be considered.
The fact that its only an alpha version will not factor at all in the court of public opinion.