> I hope that you publish your work so that we may properly critique it.

I don't know about this author, but for me, this would emphatically not be a motivating reason to publish my work. I might publish work so that someone could get some use out of it, or to show off my brilliance. But if all you're going to do is critique it (no doubt with all the familiarity born of five minutes of looking at the tutorial), then I'd just as soon you never see it.

>Here is another language designer who is not me saying "closed languages die" (https://blog.golang.org/open-source).

I don't think the person you're quoting would advocate that languages must start out as open source. Go sure didn't. It was developed closed source within Google for two years before it was even announced.