The Horde project did push out 906 releases in the last 8 months since the initial Horde 4 release. PEAR packages, better release management tools and continuous integration seem to pay off. The stream of bug fixes and improvements available to the users has switched to high speed.
At the same the time the use of PEAR packages and automatic DB migrations has lowered the effort of updates on the administrator side to an absolute minimum.
pear upgrade -c horde
And few clicks later you are up-to-date.
The code quality of the basic PEAR tools is an entirely different matter... BUT it is just soo damn cool anyway ;)