2 years ago, some people think NodeBB is unnecessary.https://www.reddit.com/r/startups/comments/1gvg7d/show_rstartups_we_were_sick_of_how_stagnant_forum/
But now, NodeBB has proved itself.

@Samurais solr needs java environment, so the memory consumption is too large.

Our English Learning Forum is using NodeBB.
EFL Club
forum.eflclub.me