Many popular C extension gems just work. About the only popular C extension I can think of which does not work yet is grpc, and there is work on that. There is

Many popular C extension gems just work. About the only popular C extension I can think of which does not work yet is grpc, and there is work on that. There is a status overview at https://github.com/oracle/truffleruby/blob/master/README.md#current-status https://github.com/oracle/truffleruby/blob/master/README.md#...