On the demand side:
There was no web in 1980 (that was 1989), the non-web internet was barely getting started and home use of it was science fiction (even home computers themselves were only few years old, 3 years if you take the 1977 release of the Apple 2 given the 1 didn't have a case). Mobile phones had been car phones and experimental devices until just the previous year, they wouldn't become commonplace for about two more decades, and even then wouldn't be significantly bandwidth hogs with video calls and streaming until smartphones three decades after the article.
On the satellite side:
Satellites are mostly powered by PV, which itself was expensive in 1980 (I'm not certain, but guessing from the size of the Starlink satellites and the exponential growth curve for PV production and total installation having been only 105 MW globally in 1992, Starlink might have exceeded worldwide 1980 PV production all by itself). Packet switching comes with computational costs, and the computers in the satellites themselves were expensive (both in dollars and watts) and low performance. Phased array antennas were really hard, computational beam forming moreso. Ion drives existed in various forms, but Hall effect thrusters wouldn't be introduced to the west for another 12 years (1992, after the fall of the Soviet Union). Laser communication was being researched, but the first successful laser intersatellite link was 2001.
