Concurrent programming (#3) is covered in most CS courses, as well as studying some theoretical areas (#4). Many universities seem to also include courses that include both writing some level stuff (#1) (like OS course) and writing at least a toy compiler for some given language (#2). The point of post is to give students tasks that are not required in their courses, but may give some knowledge/skills valuable in their future work. However, I think that your points are valid too - all of the things you mentioned are something worth spending a longer while when studying, not just being a homework assignment you forget about the day you submit it.

(Also, please don't use asterisks (* ) to indicate footnote or put a whitespace after each one. See http://news.ycombinator.com/formatdoc)