This is in the cards for Ruby 3. The plan is to migrate away from a global interpreter lock to "guilds" which are akin to execution contexts. These guilds also have a locking mechanism that allows for parallelism which they call the "global guild lock."

You can learn more about concurrency in Ruby 3 at this wonderful blog post: http://olivierlacan.com/posts/concurrency-in-ruby-3-with-gui...