Apple has no obligation but they could ease the way a bit more. Also I can't blame dev's for not wanting to do multiple compatibility rewrites during any given beta process, so no, they really haven't had "months".Considering all the problems that Office 2016 has on El Capitan, it is actually entirely on Microsoft. Apple is not entitled to make every app work on future OS X updates and there were many months for Microsoft to test their apps against El Cap betas.