The '2 pizza' days are over. Here's what everyone in business and tech is saying about team size.

Instagram CEO Adam Mosseri said his division has cut the size of its teams in half. Allison Robbert/Bloomberg via Getty Images Silicon Valley is awash in talk about tiny teams. Many are citing AI explicitly when they talk about why they need smaller teams. The changes mean Jeff Bezos' famed "two pizza" may no longer hold true. Silicon Valley's next big idea is actually quite small. Amazon founder Jeff Bezos famously suggested that to maintain productive meetings, everyone present should be…