The Apache httpd is one of the most stable software pieces which is still in use. The latest huge step forward was with the release of 2.0. Quo vadis Apache httpd? The most current release is 2.2.15. During the 2.2.x release cycle, there have basically been only bug-fix releases (Okay, response header rewrite starting on 2.2.9 is a nice feature). This brings me to the question: What is going on with 2.4?
The answer is quite simple: As you can read on http://httpd.apache.org/docs/trunk/new_features_2_4.html, not much. Why is the Apache httpd developing so slow? From my point of view the answer is quite simple: Apache httpd is finished. It is stable, reliable and has (almost) all features people wish. @Apache httpd developers: Great job! Thanks a lot!
Additionally there are tons of external modules to enhance the capabilities of this really great piece of software.
Honestly I can not publish my wish-list for the Apache httpd because there are no open wishes for me. Can someone have such a wish list? Please let us know and write a comment.