Yeah, I've toyed with Mruby, and it's great. Same w/webasm support for Ruby. I think overall the huge improvements in the Ruby ecosystem kinda drove my own down the priority list - it was mostly educational to start with, but the better the various other Ruby implementations got the less of an incentive I got to try to turn it into anything more than that (and doing so would be a massive undertaking). Hitting the "self-compiling" milestone felt like it was a decent place to pause it, but I'd still love to find time to take it a few steps further. At least fixing the most egregious bugs (the compiler itself has various temporary workarounds for bugs to allow it to compile itself without triggering them, and I'm not happy about leaving it in a state where I can't at least strip those workarounds out).