Your interpretation of the tinyrb omissions is wrong. I'm the current maintainer of potion which is the underlying VM for tinyrb. What is missing us just sugar and peg parsing grammars for some trivial stuff. And then of course the huge stdlib.
The simple potion/IO mop and ABI layout is far superior to matz ruby, just the method cache and thread support is missing. And this compiler has no optimizations at all yet, not even trivial constant folding. Still 200x faster.
This lua with mop VM can be used for every dynamic language, like ruby, perl, python, PHP, ... and will beat rpython or truffle/graal by lengths. The other VM based on this tvmjit ditto. This uses even luajit with s-expressions.
The simple potion/IO mop and ABI layout is far superior to matz ruby, just the method cache and thread support is missing. And this compiler has no optimizations at all yet, not even trivial constant folding. Still 200x faster. This lua with mop VM can be used for every dynamic language, like ruby, perl, python, PHP, ... and will beat rpython or truffle/graal by lengths. The other VM based on this tvmjit ditto. This uses even luajit with s-expressions.