The list is fine, the title is misleading: these are not projects every programmer should try, only the ones that want a more serious challenge than their usual

The list is fine, the title is misleading: these are not projects every programmer should try, only the ones that want a more serious challenge than their usual. For many programmers these challenges are too difficult and a complete waste of time, as a certain psychologist was saying IQ is something you cannot train and IQ is generally telling how fast you can learn new things; with an IQ that is not enough, that time goes to infinite. Programming is now accessible to so many people and programmers are so diverse, enough have an IQ low enough to contradict the title.