The Emacs dumper dispute
Emacs is my primary editor, however Emacs dumper has always been a dumpster fire.<p>Basically they coded up so much ill-concieved and inefficient Emacs Lisp that the editor would never start up in an acceptable time.  Instead of engineering around this (lazy loading services, fixing things, not doing things nobody needs) they had the great idea they could start the editor once and then core dump the in-memory state of a running editor.  Then on later editor starts they would map-in the core dump and instantly be in a (somewhat) good state.  Fails all kinds of smell tests and really speaks to bad taste having unbounded consequences.  It is an idea that should not work and it is only happenstance that it ever worked (and it gets harder and harder as we have things like address layout randomization, file handles, and so on).<p>[edited &quot;file&quot; -&gt; &quot;fire&quot;, sorry! And yes I know lispers always dumped, but they are dumping the C memory environment here- not just their precious Lisp state.  They should have had some appreciation for how the C environment actually worked since they decided to use it.]