[dkersten]

MRAM(1) will bring memory latency down a good bit, if it catches on and advancements keep getting made. Its still going to lag behind the speed of processors though and the system bus will still be a general I/O bottleneck (especially if the MRAM is not on chip). SSD and MRAM may cut down the I/O latencies, but they will never eliminate them, so asynchronous/concurrent operations through lightweight threads will still be important.

He also forgets things where independent processing is desirable because it eases modeling the system which you're modeling, eg a friend used Stackless Python to code that zombie outbreak simulation and each zombie got its own green thread because it simplified the simulation.

Of course, he has a point in that the language should allow green threads to be added as a library, rather than being built in, but most languages would actually allow this. Also, Erlang may have lightweight threads, but its still SMP-aware.

1. http://en.wikipedia.org/wiki/Magnetoresistive_Random_Access_...