Brian Wolff bawolff@gmail.com writes:
Does anyone actually have anything they want that is difficult to do currently and requires a mass compat break?
I haven't heard of any "mass compat break" items. But I have seen developers who aren't worried about compatibility or continuity of features since they only have to worry about the WMF cluster and issues of compatibility are handled there, or the features aren't used by the WMF.