First things first, not sure “so buggy” is the right note here. Might be that, or might be more a combination of “so important” and taking advantage of a feature or bit of code that has been put out to pasture or has been replaced.

That said, this post from Worth Doing Badly is an interesting read, developer or not. The list of apps is long and familiar and, if you are a dev, there’s some depths to plumb.