Sure I just too care of this there are a few others I left which I am unsure about, what should I do with them? (byebug, ruby-prof, better_errors, rbtrace, gc_tracer, stackprof, memory_profiler)
That said we are totally blocked on truffle till we get mini_racer working per:
https://github.com/oracle/truffleruby/issues/1827
Discourse is not really properly functional if you can not cook Markdown to HTML on the server.