This is poorly related, however: Knowing that I've been to this page ages ago, but without a sense of how long, I am reminded that pages without a datestamp are annoying. Even the comments are missing them. Am I alone here? [To justify the age somewhat, he comments on the release of firefox 3, where I believe 3.6 is current.]

More to the point, I was surprised that you can right-click-save the drawn output without any overhead on his part.

And [paraphrasing,] I equally miss being able to boot into an interpretor or programming environment when a machine has no boot devices. I imagine the overhead is low, so it's likely just licensing + apathy [irrelevance more likely].