Hacker News continues to amaze. There's always a worrying high ratio of comments in health and diet threads from people making drastic and impulsive decisions without medical advice, usually off the back of incomplete conclusions or anecdote.
Newspaper coverage certainly needs to contain more scrutiny of the quality of scientific papers (and their review), but this paper explicitly concludes that there are other factors at work.
Don't stop taking your meds. If you have reflux issues and you're concerned about this, take the paper to your specialist and get their informed opinion.