My head is spinning after skimming the sections on shared memory, locks, mutexes, etc. Implementation and adoption would probably be a decade-long saga. Not to mention teaching folks when to use these and how to use them correctly.

In e.g. Elixir these are non-issues. Please, just give us declarative structs that are immutable by default (if they’re really needed, make constructors and mutability opt-in). Isn’t the trend already toward more FP in JS?