Very true. The only exception I could think of to that is when we are working with new technologies. As an example, node js and clojure are changing rapidly eno

Very true. The only exception I could think of to that is when we are working with new technologies. As an example, node js and clojure are changing rapidly enough that the year to year difference is not insignificant. As we deal with technologies that are progressing more and more rapidly with time, it would probably be a good idea to keep in mind that some people who used to know what they were talking about may no longer have any idea of what is actually going on. But this is more a particular exception to places like Hacker News. If I had a facebook, I would never do this sort of thing there. That would really really suck.