First of all, I don't expect the IBS to ever do something that ABuff doesn't already do. ABuff covers all angles of the buff creation and manipulation process, it just does so in a way that I, as a user, do not like. That is why I am offering my library as an alternative to ABuff; surely there are users out there who are like me in thinking that the syntax of ABuff just isn't for them.
Also, IDDS and IBS are fully compatible. Because of how easy the IDDS and IBS are to use, the IBS won't ever require the IDDS. If you want a buff that happens on damage, then rock on, you can do it already with the version that's up.