Two week notice during the holiday season seems pretty sudden and painful for users. I feel bad for those who now have to scramble and probably miss time with their families as a result.
I really feel bad for those who committed their company to this company.
In my eyes it's evidence that you definitely shouldn't bet your company on a startup unless you have a backup plan that you can implement quickly or the benefits are massive (ie: the reward is worth potentially losing your business). Larger companies also kill products but they tend to give a lot more heads up.
The difference is that Adobe have money, so it's not a two weeks notice, but two years notice - which is reasonable!
Unfortunately, new customers where still annoyed and chose alternatives.