I must note that TruffleRuby is a fantastic and genius bit of work with similarly genius folks working on it, but to answer your question.. there's a big cultur

I must note that TruffleRuby is a fantastic and genius bit of work with similarly genius folks working on it, but to answer your question.. there's a big cultural aspect. Things involving Oracle, the JVM, and Java generally do not tend to particularly click well with the entire Ruby world (but are just fine in specific niches). Consider that JRuby was significantly faster than CRuby for a long time yet the level of usage it got never really reflected that. Also consider just how poor Windows support was in Ruby for many years - this also wasn't purely a technical issue.