Mark ended up designing several things in JS (like WeakMaps), influenced by his work on Caja (object capabilities for JS). I ran into him a couple of times whil

Mark ended up designing several things in JS (like WeakMaps), influenced by his work on Caja (object capabilities for JS). I ran into him a couple of times while he was doing standards work with Dave Herman. I would be surprised if he was not involved with Fuchsia. Fuchsia has object capabilities written all over it.