[mdaniel]

I believe TruffleRuby <https://github.com/oracle/truffleruby> is the state of the art for Ruby on the JVM, and <https://news.ycombinator.com/item?id=33503622> says that Mastodon works on it, so that's one data point. I haven't worked up the emotional energy to try to get GitLab to run on it