I am going to be modding my vBulletin 3.6.8 heavily, with template modifications, mods from here, and some mods of my own. Now come upgrade time (vb 3.7) my site is pretty much screwed right? I don't want to upgrade because all my template modifactions and mods will be ruined.
Is it safe to run my vB 3.6.8 for as long as my site exists? Or will it be hacked in the future?