If Bronies never existed? Well for starters, I cannot imagine that this website would exist at all The show most likely would have ended at Season 3, fan conventions/meetups wouldn't exist for the franchise, there would be less e-drama (although seriously, there has always been e-drama and there always will be)
As for me, I would probably still be watching YouTube videos all the time after I got home from school and never would have actually done much else. Heck I don't know anything else I would do if I didn't become a Brony!