Mark S Miller (aka @erights) had earlier indicated that in light of Meltdown/Spectre. Dr. SES needed a rewrite. Here we see it progress, with an extensive demo and a secure @warner on bugs.
Not too sure, as I don't see any announcements, but Agoric SES-shim github repo has been renamed/moved to endojs/endo .
Moved and split-up into 3 different approaches to solve. //toDo I'll try and find the remarks on github by @erights.