Most of the web stuff I have to work on is developed once, and then maintained rarely (once a year or so). It's not the kind of project that has continuous development. So whenever I've used a framework or SDK, when it comes time to add a small feature or tweak, I spend more time bringing the project up to date with the latest version of the framework or SDK than I do implementing the feature.

Literally every time I update one of our sites using a Facebook SDK, they've changed around how the whole SDK is designed and I have to rewrite basic things like session management.