Org mode 9.0 released
Reading through the list of changes, I am very happy that I moved away from org mode.<p>- New syntax for export blocks<p>- org-file-apps no longer accepts S-expressions as commands<p>- Preparation and completion functions in publishing projects change signature<p>- Old Babel header properties are no longer supported<p>So in other words, for the classes I teach every two years, I can forget about being able to open up my previous files and have them just work. This was a <i>constant battle</i> and is pretty much unique to org mode.