Related, are you aware of the JRuby+Truffle project [1]? Not a new high performance JVM language, but a high-performance implementation of Ruby using Truffle and Graal. On the surface it sounds extremely similar to Ruby+OMR (applying a high-performance, production-pedigree compiler/interpreter to an experimental Ruby implementation), so I'd be interested in hearing about any direct comparisons or knowledge-sharing between the two projects that might be possible.

[1] https://github.com/jruby/jruby/wiki/Truffle