The beer has changed over there years from buying the beer and drinking it on the spot to having massively flavored beers that need time to age for all the flavors to come to fruition.
Avery Brewing Company out Boulder, Co. is a prime example of a brewery that makes very powerful beer that can be aged for 1 to 25 years.
Must you age big massive beers? Of course not! However, by aging beer you'll actually be drinking the beverage the brewers intended upon.
Beer does not have the shelf life of wine and that should be noted. While certain wine can be aged for 20 to 40 years, beer typically becomes oxidized (oxygen has now affected the flavor of the beer negatively) quite quickly. You can also visit https://bevtools.com/collections/drinks-on-demand online and know more about the store beer.
The average shelf life of a basic beer (5 - 6% alcohol by volume -abv-) has no more than 6 to 8 months. The higher the abv the longer you can age a beer.
Some beers can be aged up to 25 years and still taste amazing! These same beers after 2 to 5 years start to take on the flavors intended by the brewers; these beers are meant to be aged!
Some brewers have no idea what will come of their beer down the road while others have a very good idea; this is half the fun of aging beer.