sol_plunder
"A lisp machine with fully automatic persistence. No database or filesystem needed" is actually a fairly accurate description.
Making processes persistent has nontrivial overhead, so the Erlang model probably doesn't translate well in practice to Plunder.
Plunder is not an obscurantist project, and intends to be straightforward and easy to understand.
Here is a recent attempt to explain the paradigm succinctly: https://git.sr.ht/~plan/plunder/tree/master/item/doc/PLAN.md
Very open to feedback as to how to express these ideas more clearly.
https://git.sr.ht/~plan/plunder/tree/master/item/doc/PLAN.md
This document was written by an Urbit dev, and the Urbit community is the target audience.
The conversation here seems to be mostly shitting on Urbit with the usual HN critiques.
However, Plunder is only tangentially related to Urbit.
It's the same paradigm, but totally different otherwise. Heavy Haskell influence.
The project is still mostly underground, but I'm happy to answer any questions.