The number of Elixir/Erlang backend suggestions seems over-represented. Not even Phoenix, just a blanket language suggestion. This leads me to believe that many posts are throwing out their newest stack-fad they imagine would be good for an application. I wouldn't take too much stock in the frequency of keywords here.
After working on a Phoenix project and using LiveView and Tailwind it just makes my brain hurt to think of using anything else. I expect Phoenix is over-represented here because Hacker News tends to attract the smart set.