Well the idea is that thread creation itself is not really cheap. For most software I would say it is not really a problem, but if the "work" to be done is shor

Well the idea is that thread creation itself is not really cheap. For most software I would say it is not really a problem, but if the "work" to be done is short enough, that creation of thread becomes the most costly factor. True, that can be solved by thread pool usually. So I guess as with most things in software engineering, if there is something wrong with threads or not depends on your use case.