if Mabi never existed my pockets would be deeper, I wouldn't be attached to video games as much, I would be way more innocent then I am now, my IRL friends wouldn't yell at me every-time I mentioned Mabinogi I wouldn't be called boring, I would be more healthy/active, I would be less worried, I wouldn't be ticked off as much as I am (gacha releases) my social skills could improve? maybe? and of course I'd be doing better in school, in additon better at art. Honestly though, everything would be better in life.... however Mabi existed and I love it.
To answer if it closed down, I would go the tough guy approach but I'd be really upset q~q, would take me like 2 weeks to recover, i'd then sit patiently for Peria Chronicles, Blade and Soul, Black Desert (the combat looks kinda clunky tho ) and I would have time to watch boku no pico and some other good anime, also I would probably make a move onto Tera i'm trying to hit max lvl, lvl 42 slayer (slayer is fun but crap in the long run...) and apparently reaper was ping friendly so I made one but lvling slayer first. but yeah i'd be pretty depressed for a while, and I'd try an keep in contact with Mabi friends I'd probably visit this forum every so often, for a bit till it dies .