It's not as easy as you seem to think to e.g. (de-)multiplex a single TCP port to/from 1024 cores, and that's before you actually try to keep any application state in sync. Lots of stuff breaks at that level of concurrency.
First part makes sense, but the last part doesn't. Keeping application state in sync doesn't need to affect the throughput of events coming out of a multi-threaded application.
