Totally not a concrete link, sorry, but - in a video from one of Lua conferences, I've seen Roberto mention in some polite yet clear way that talks with Mike which they had had always come to a standstill on something - at least that's how I recall it. On the other hand, since 2015, Mike was looking to pass luajit development on to someone else - so with this, situation could possibly change in the end. But I'm not sure what's the current status of this search; I seem to recall CloudFlare was reported to be in talks, but I don't know how it all ended - or if it's still unresolved.