Originally Posted by
Gleeok
One problem is that a good custom quest with all the bells and whistles could take years. It just doesn't make for a good contest because it is an almost impossible task for one person. By comparison, a (many) good 5th quest(s) is totally doable in a reasonable amount of time, and because the tools are all rudimentary and easy to use ZQuest features, it can be a fun and not all-consuming experience as well.
Take a look at neofirst, which was in development since 2006, and that may or may not be completed anytime soon.