title_body: Popularity of tank beer
upvoted_answer: According to the article you linked to, the specific draw of tank beer is that it's unpasteurized.  This does also exist (albeit not served from tanks) in the form of Real Ale, or Cask Ale in Britain.  Historically, this was not only popular, but the primary distribution mechanism for beer in Britain a hundred years ago.  However, its popularity has diminished over time because it's harder to transport and doesn't last as long as pasteurized beer, making it more expensive which necessarily reduces the size of the market that can and will pay for it.   
  
  Tanked beer is something that you see in brewpubs in the United States, where transportation isn't an issue (since it's being brewed on-site) but real ale is definitely on the decline in the U.K. and possibly only survives due to CAMRA, the British Beer Preservation Society's Campaign for Real Ale.