Well, he could have posted on the Oculus blog[1] - as the subject matter would have been very relevant.
> I don't see it as any different than posting on Medium
Medium doesn't try to coerce readers into singing up for an account. Nor does it track you across domains. Nor does it smash a lengthy article into 1/4 page width.
> But seriously, who cares?
A lot of folks, myself included. Not only was it difficult to read due to the formatting, but many have strong objections to Facebook in general, causing Carmack's thoughts have less reach.
Facebook is not a blogging platform, it never has been a blogging platform, and it never will be a blogging platform. It's simply not setup to be conducive of blog content. I wager this is the reason Facebook decided to not use Facebook for their own blog posts[2].
Technically you can violate the ToS and set up a fake account, but that's a bit of an inconvenience
On loading a page, I get a modal popup obscuring all content insisting I "register" or "login", with a "not now" option. Then when you click "not now", the bottom third of the screen is obscured by a fixed overlay.
It is loosely describable as readable, but in practice, it's a fight to read it. The element has randomly generated id, so can't easily be blocked with ublock or similar.
Not what I think of when I think "technical article" http://i.imgur.com/nmoFIQL.png