"On the one hand, [the iPhone has] been great, because now pretty much everyone in the world has a phone, and that's kind of what enables pretty amazing things," Zuckerberg said in an episode of the "Joe Rogan Experience." "But on the other hand ... they have used that platform to put in place a lot of rules that I think feel arbitrary and [I] feel like they haven't really invented anything great in a while. It's like Steve Jobs invented the iPhone, and now they're just kind of sitting on it 20 years later."