Earlier quoted context omitted.
AT&T was broken up in 1982. Our manufacturing peaked around 1990 and what really pushed it downward was China joining the WTO. We also halted a lot of fab construction domestically after the GFC of '08.
the *case started in 1973 and was threatened for almost a decade beforehand. That put the entire industry on edge.
Notably high profits from long-distance dialup calls kept online services stuck at 2400 bps for most of the 1980s. Futurists circa 1960-1970 thought online services were going to become widespread about 15 years than they really did and AT&T was the #1 thing to blame.