> The new head of Facebook AI is 28 years old? That's not OK, that's too young. Too inexperienced and not worldwise enough by a long shot.

This is ageist in the way I don't usually expect from the Valley. Plenty of entrepreneurs have built successful or innovative concepts in their 20s. It is OK to state that Wang is incompetent, but that has little to do with his age and more to do with his capability.