I had a similar experience as the author on a boat in the south pacific. Starlink was available but often wasn't used because of its high power usage (60+ watts). So we got local SIM cards instead which provided 4G internet in some locations and EDGE (2G) in others.

EDGE by itself isn't too bad on paper - you get a couple dozen kilobits per second. In reality, it was much worse. I ran into apps with short timeouts that would have worked just fine, if the authors had taken into account that loading can take minutes instead of milliseconds.

Low bandwith, high latency connections need to be part of the regular testing of software. For Linux, there's netem (https://wiki.linuxfoundation.org/networking/netem) that will let you do this.

An issue that the anonymous blog author didn't have was metered connections. Doing OS or even app upgrades was pretty much out of the question for cost reasons. Luckily, every few weeks or so, we got to a location with an unmetered connection to perform such things. But we got very familiar with the various operating systems' ways to mark connections as metered/unmetered disable all automatic updates and save precious bandwidth.