Of course they do. Anything can give you concurrency. But pretty much anything can make concurrency easier, than threads.
> Why do you think people wrote multi-threaded applications back when almost all machines had just one processor and just one core?
Almost none did. Popular networking servers were either preforking, forking or asynchronous. Desktop GUIs were event driven. Threads weren't even very usable on most systems at that time, i.e. up until a decade and a half ago or so, weren't they?
