Anecdote is not data, but for Emacs has been pretty bug free. My impression is that things that get used tend to be robust and my belief is that bugs in code that isn&#x27;t used isn&#x27;t a problem. From the discussion on the proposal, my guess is that the people who tend to use obsolete packages are people who have been using Emacs for a really long time, and my feeling is that such people know what they are getting into.<p>That said, I guess my premise is that Emacs is a bit unlike a lot of software in that new users encounter problems with features and only very experienced users are likely to experience bugs. YMMV.