Sort of related - it drives me up the wall when css frameworks change low level component class names. Bootstrap did it going from versions 2 to 3 and Foundatio

Sort of related - it drives me up the wall when css frameworks change low level component class names. Bootstrap did it going from versions 2 to 3 and Foundation did it going from 5 to 6. Existing sites are either left to bit rot or or have to be given attention that would have better been spent elsewhere.