This is what non-commercial tech looked like back before the gold rush and vulture capital. Geeks and nerds in basements doing weird stuff that would be laughed at by most people on the street. Most STEM professions were middle class, not lottery tickets.
What do you mean? Things like those still happen, and probably will for a long time. They did end up being slightly nicer looking though, cheap 3D printers and CNC machines really increased a baseline of what hobbyist in the garage can do.
Go to website like https://hackaday.com and there will be plenty of projects like those. (Although this one is more complex than usual, so you might have to lookover a few months' worth of history to find something on that level)
I don't think the pay is really what changed all that much. Median pay for SWEs according to ZipRecruiter is $118k, which is $40k in 1987 USD (the year the person in the article started). BLS data from 1987 puts that at mid-way through the 4th income quintile, which is middle clash-ish.
Levels.fyi slants towards the higher end of pay and they say $192k, which is $65.4k in 1987 or right at the bottom of the top quintile.
Part of what changed is that software abstracted enough for hardware and software to become separate fields, so a much smaller portion of software folks are able to wire together batteries and motors and what not to go with their software.