The engine used for this forum isn't really fit for purpose. Facilities that instantly spring to mind as essential that are missing are:
Ability to go straight to the first unread post of a thread
List of threads that a member is subscribed to and that have new posts
Be able to quote a member in a reply
To be able to see where you have been quoted recently
Use of smilies
And, of course, an automatic 100,000 volt shock administered to anyone starting a new thread to thank people who have answered a question.