[pcwalton]

We've had sandboxing for a decade on mainstream operating systems with mainstream browsers. I doubt that just adopting Plan 9 would offer any meaningful security improvements over the status quo. It would just be switching a big pile of non-memory-safe C++ for a big pile of non-memory-safe C.

[pjmlp]

Well, at least we will be using C Machines in a decade, if the trend for hardware memory tagging keeps going on.