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 securit

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.