Why not? The Facebook platform doesn't have a blogging component, so they have to use a CMS, or a custom written solution, or just public static HTML.

Perhaps you should jump to the actual value statement you're making ("Real tech companies shouldn't use X (Wordpress)" or "Real tech companies should use Y")

Yes it does, Mark has used it for public letters in the past: https://www.facebook.com/notes/mark-zuckerberg/a-letter-to-o...

But this is more of an investor relations thing, so that might've had something to do with it.

Not that Facebook hasn't tried to have a blogging component before...

early 00's php standard-bearers gotta stick together

Wouldn't call it a standards bearer then - it really picked up momentum around 2010. Many shops that use Ruby, or whatever the cool kids are using, in their core products, deploy their public-facing site using Wordpress.

That's like asking someone why they drive a Toyota Corolla.

If Elon Musk drove a Fiat that leaked flaming oil, everybody would ask why.

It's powered by https://vip.wordpress.com

^^ This is correct.

hey, whatever works