> Facebook/Meta/Zuckerberg seem almost uniquely unable to turn the startups into great new businesses, when compared with the other big tech companies.

Really? Instagram, WhatsApp... the two most used apps & services in the world?

> Google added Chrome, Android, cloud, Youtube,

It's arguable how GCP is profitable, but chrome/android/yt are money-losing businesses if you exclude ad revenues.

They're money losing business if you exclude their revenue source? Thats a weird take, you could say the same thing facebook itself ...