Am I Insane for preferring vBulletin Suite 4.2.3

Hi:


I am curious if I truly have lost my mind by preferring to use vBulletin Suite 4.2.3 considering how old it is and that it doesn't work on PHP versions newer than 5.6x. The reason I am clinging to this is because my volunteer job has built its corporate intranet on vBulletin Suite and add-ons from Dragon-Byte Tech. Another reason I don't move on is due to consistency for not only myself as the administrator but also my users. A lot of my users on our corporate network are extremely sensitive to change so without me holding a training explaining all the new ways to do familiar tasks; we just leave well enough alone. I myself can't even stand that everything is moved around on the admin/mod panel for me but also the front end thus making it hard to support users.

So... am I insane for relying on such ancient software?