I don't think the author says versions are useless.. yes they are handy to indicate, well, what version you use, but from a code point of view he is totally rig

I don't think the author says versions are useless.. yes they are handy to indicate, well, what version you use, but from a code point of view he is totally right imo. Look at it like this: there's the choice between a) writing a huge if/then/else for every version you can possibly encounter and b) checkig for features. I'd pick b).