Not to take anything from Self, but in regards to HotSpot, a more accurate history attributes the lineage to Smalltalk and the Animorphic team. Some details here https://en.m.wikipedia.org/wiki/HotSpot

Right. Sun incorporated Animorphic's work into Self, and later purchased Animorphic and the technology became known as HotSpot.

Although I would only consider this developer ready at the moment, ooen efforts like this have promise, at least you have choice what back end if any https://www.kickstarter.com/projects/seeed/respeaker-an-open...