Something which clarified Zuck's behavior in my mind was an interview where he said something along the lines of, "I could sell meta for x amount of dollars, but then I'd just start another company anyways, so I might as well not."
The guy isn't doing what financially makes sense. He's Uber rich and working on whatever projects he thinks are cool. I wish Zuck would stop sucking in all his other ways, but he just doesn't care about whether his ideas are going to succeed or not.
I frequently forget that chrome is installed on my phone. The only time I'm forced to use it is about once a year when I order Papa John's Pizza takeout. Their checkout page doesn't seem to work in any other browser.