vBulletin was the best commercial community script of the early 00's but AOL was the best search engine too. You have to move and adapt with the times.
Any feature you say cannot be converted is a limit on the admin and his coding abilities and not on the script.
Staff and most of the active members are intelligent so implying they will have trouble with the new layout is an excuse and an insult to their intelligence.
Jasons comment about the html and CSS is also a terrible excuse. Any good designer and coder can create any layout just like vBulletin. A poor coder or designer will struggle.
Jason's comment about IPB's resources are also false. vBulletin is very heavy compared to IPB if you have the settings optimized correctly. Kids who import hundreds of useless mods and plugins without activating any of the optimizing settings give IPB an undeserved resource hog name.

The simple matter of fact is KWWHunction can't stay with vBulletin forever.It either moves now or leaves it another year when it's forced to move. Either way it's only a matter of time.

EDIT:
For those that don't know KWWHunction was previously converted to IPB by the old staff over a year ago. The theme wasn't converted but the site layout, posts and members were all successfully transferred. It all seamed to work perfectly and flawlessly.