I had already read several descriptions of M0, from the first time I heard about it in 2011, including the one you quoted. Aiui the MoarVM approach is to start with a version written in hand coded C (and stick with that through 6.0.0) and then rewrite MoarVM and its JIT in (a subset of) Perl 6. This still makes sense to me as the appropriate P6/Rakudo/NQP flavored version of M0 thinking.
But am definitely out of my depth, and the OP was about Rakudo/JVM, so I'm going to quit talking about M0 and MoarVM.
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