The author thinks these are valuable challenges every programmer should try. Not must, should. It's just an opinion. If you don't agree with it, then don't do the challenges. Why does it cause you to write a 200 word rant?
Why did cletus' post cause you to write a 40 word rant?
I thought it was a valid point. 1000 books I should read? If I devoted all my free time, for the rest of my life, I might make it. But that leaves me exactly zero time left for the next person who's got some fine-sounding "should" for me, or the next, or the one after that. It's all my time for the rest of my life - for one person's "should".
I don't think it changes the problem to say "should" instead of "must". It's just an opinion. It doesn't create any more of a "should" for me than it does of a "must".
