Agreed. And since when is criticism a bad thing, esp. on HN? Especially since most of it here seemed meant to start a discussion, as in "I'm not sure this is th

Agreed. And since when is criticism a bad thing, esp. on HN? Especially since most of it here seemed meant to start a discussion, as in "I'm not sure this is the best way to teach programming, wouldn't X be better." I thought this would be a worthwhile discussion to have as opposed to only useless "OMG this is the BEST thing ever" comments.