my dude. beer absolutely can go bad. it depends on the style of beer and how it's stored.
Discussion
Exactly, it has mainly to do with storage, if it is stored properly it can take a very long time to go bad.
a lot of microbrewery beers that come in cans don't last as they're made and canned to be drank within a month or two before they go flat. hell some even quicker than that 2 weeks tops.