if it hadn't been for AT&T we'd have had the internet in 1960.
There is no world in which the DoD declassifies packet switching, invented in the late 60s, and opens that up into the world. This work was essential to making ARPANET, which was the first interconnected network that we can call useful internet, which was only open to the few academics and military institutions that worked on what was later known as DARPA projects. There is no putting this on Ma Bell as a reason for us not having internet in the 60s.