Was there ever any consideration of the rubinius JIT? It seems that for a somewhat small community like Dylan has, pairing up with other small groups to make and improve a shared JIT would be a better use of resources.
Interesting question. I would say that the answer is "no, the rubinius JIT was never considered" ... One thing is that we don't just JIT compile code. In fact, we only do on Windows when under the debugger / REPL. We do AOT compilation, for better or worse. LLVM is a pretty nice match and gives us a lot of good things, including DWARF debug info.