>>130159767I know you're parodying the sorta people who'd take this too seriously but the way they depict Barney he'll outlive the whole town no problem. The man's got stamina to spare, in fact the beer is basically there to stop him from being easily the most competent and athletic guy in town by a mile, and even while still drunk he's achieved stuff like the Plow King business or an award-winning short film.
Ironically the episode that portrayed him in the worst light was the one that made him sober, and that was solely to justify that change that no one liked and eventually had to retcon.