Indeed, he is killing his darling before someone else can.
No interest in working there personally because I despise both PHP and working in an open office, but I don't think the Zuckerberg brand of fine social content is going away any time soon.
I live in the U.S. I use Whatsapp to connect with family members in another country. I have a Facebook account just for my informal HOA community posts. I have zero fb friends. I hope my HOA finds another means to communicate.