Even Ruby has JIT now
True! But pjmlp was referring specifically to advanced JIT implementations, so I wondered which JITs he was referring to as advanced.
In Ruby's case that would be RubyMotion, TruffleRubby and JRuby.
That trace back to Apple's efforts with MacRuby, or Sun's (for a while Netbeans even had Ruby support).
If you go that route, GraalPy is there too, so the argument is not as strong as it seems.