I finally caught up to the bottom of this thread I’ve wanted to post into since it first appeared a week ago. Funny coincidence versus the immediately previous poster …
When I was a kid in Orange County, CA in the early 1960s one of my dad’s pals owned an orange grove fan company. They installed and serviced the fans on tall poles installed throughout the many, many groves still in the county.
Back in the day, with remote control tech being so limited, they had armies of low-wage workers to drive out to each farmer’s grove, push the start buttons on each individual pole, and deal with the inevitable failures to start on whatever fraction of machines screwed up. Given the nature of coastal weather in SoCal, the emergency “Oh Noes! There’s going to be cold temps, fire up the fans!” orders always went out around 10pm or midnight. Ugh. I hated that call.
There are substantially zero groves left in So Cal, so the job & company are obsolete locally.
My own obsolete jobs, of which there are several:
In HS / junior college my first IT job was maintaining plug boards for IBM tab equipment. This was the early 1970s and that job was already in its buggy whip days then. By even 1990 I bet there was none of that gear alive anywhere on earth except in a museum.
I graduated to programming on punch cards (and yes, ASR/KSR-33s). Then a near-endless succession of now-dead languages on now-dead OSes running on now-dead hardware.
Like some other folks upthread, my first USAF job from the early-mid 1980s is now obsolete and has been for a decade or two. I was a flying Forward Air Controller (“FAC”). The mission still exists, but now it’s done (badly) in fast jets, not in slow but unsurvivable prop planes. The ground FAC role of my job used to require an officer / pilot do the work, but it’s now done by enlisted specialists. The details of how it’s done have morphed completely as well, despite similarities in the big picture.
My first airline job in the late 1980s - early 1990s was as a flight engineer, the 3rd crewman in the cockpit. There are substantially zero flight engineers in passenger service anywhere on Earth, and only a few dozen airplanes (max) still in civilian freighter service that need flight engineers. The military still uses them on some old equipment but even they have broadened the duties of the FE to encompass other roles. Preparatory to phasing them out completely.
In the early 1990s I also started and ran a company in the 900-number business. The tech still exists, but the business model doesn’t.
I seem to excel at getting on on the trailing edge of the last big thing. I’m now retired and I hope for everyone else’s sake that I’m not one of the last Americans to have that opportunity before our shit hits the fan and everyone works 'til they drop. Like back in Ye Olde Darke Ages.