And your point is?
I can't really get a handle on where the article is supposed to lead me.
Linux is running on more machines worldwide than just about anything else. Just Android smartphones, TomTom navigation devices, various set-top-boxes and smart-TV's outnumber the only operating system ordinary people have ever heard of (Windows). BSDs? I'd be hard pressed (apart from certain parts that made their way into things like the Windows TCP/IP stack decades ago) to name anything that's really come from them. So it's not really unpopular in either in-depth-hardware-geek territory (who most certainly would have heard of BSD, and would use it if they could - because it doesn't require them to expose their own code - but yet hardly anyone makes embedded devices that run on it), or even just general usage in homebrew projects (Raspberry Pi, various handheld consoles, etc.). I don't get the argument you're trying to present there by suggesting it'll all go titsup.
And Linus is preventing Linux forking by being unique - so if it forked, who would do Linus' job in the fork? Either someone would come along (and thus Linus wouldn't be unique), or someone wouldn't (in which case it wouldn't be forked).
I've lost the point there, apart from suggesting that the GPL (*the* most popular open source license) is somehow corrupting. I believe that was its intention, so people couldn't freeload from it for their own commercial purposes and not contribute back (for hobbyist purposes, it has no real hindrance because you only have to offer your code to the people who end up with the end product of your derivative work, which is probably just you).
And quoting Tannenbaum is really the last straw - his own progeny MINIX hasn't been touched in years, barely runs any of the huge amounts of code out there today and is unheard of outside of academia teaching operating systems. He operates in a world of perfect mathematical programs and no real-life OS would ever satisfy those criteria and always be "obsolete" (and, don't forget, MINIX predates Linux and Linux is basically the "I can do that better" version of it that Linus wrote - I think he proved his point).
I'm not a massive advocate for the subtleties of open-source, I avoid licensing wars like the plague (seriously, BSD, GPL, or proprietary is all I really care about - even the versions don't bother me much), and I don't care for the personalities and their opinions much. But this article is a rambling mess that somehow tries to sow seeds of doubt about Linux with no, actual, real point to do it with. It's the sort of thing I'd expect on the FSF website, not here.