Yep, I agree, seems like we are on the same page. I made my own framework based on my specific uses, so I even get to control when the fallbacks are removed, and deal with any of the fallout if there's issues.
I kind of think that at one point, everyone that works a lot with front end web development should make their own framework. It helps you learn to make long term decisions, deal with design iterations where you have lots of wide spread use of older systems and many other things that help you make wiser decisions in day to day interface design. But also it can help you see where things like Bootstrap are helpful and where it is not.
