I can't believe all of you are telling me that phpBB has a better organization? They operate almost identically to you, the user. The themes were not identical, but other than that they look about the same. vB has some extra features, much are very beneficial to you users.
As far as why we switched, most of you vB supporters have already touched on some points. The main points other than security is ease in upgrades, ease of mod installs, ease of theming, ease of about everything. Everything is now configurable via a nice web interface making changes 200% easier. And mods and theme changes also don't effect the main code when making updates. I don't expect many of you to care about that fact.
Will this vote make us change? No way. We also haven't forgotten any fans of you fans, how can changing a web forum software make us appear to have forgotten you? That I just don't understand.