The DLR Band song Counter-Blast (from 1999) is fairly dated, asking if someone is online:
Tell me, tell me, tell me
Who’s your favorite page
I’m gonna fax you
Into the atom age
My engine searching
Like a harpoon
Like a monsoon
In your chat room
Who are you
Are you online
A few years ago a local radio station had a call-in contest, playing a snippet of that song and asking callers to name the 10,000 things that still exist that the song refers to. The first wise-ass caller said “Stupid Maroon 5 songs.” I loved that answer.
Astrolabes? I’ve known about them for years now. 
How many people nowadays know what a rotograveur was/is?
Rotogravure is one of Ringo Starr’s post-Beatles solo albums, so fully qualifies as an excellent example of dated and obscure technology. Apparently its named after something.
Obscure, but hardly dated. It’s still in widespread use. It’s just that hardly anyone thinks about how things get printed in high volume. And it’s no longer used as a metonym for a color newspaper page.
[quote=“terentii, post:63, topic:975774”]
Astrolabes? I’ve known about them for years now.
How many people nowadays know what a rotograveur was/is?
Astrolabes? [/quote]
Yep. I knew what they were too. Just hadn’t seen one in real life, except for a sloppily built fake for sale at a RenFair once.
Off top of head, a rotogravuer is a type of printing press, invented ~1800s. I don’t recell more about them than that. Etymology suggests it was a roller-type so continuous operation versus the earlier mechanical presses that worked by stamping motions.
The Guardians of the Galaxy films might have refreshed the younger generations awareness of cassette tapes and making recordings at home. But has Bow Wow Wow’s debut single C.30 C.60 C.90 Go become an obscure reference?
TCMF-2L
Another Car Phone song:
Way back in 1966 or '67, my dad and I went on a tour of a newspaper printing plant. We saw how the linotype operator produced the text used to create the paper-mache molds with which the cylinders for the rotograveur were cast.
At least, that’s how I remember it. I’m sure the process is completely automated today with computers doing everything.
NOTE: I was in college the first time I heard about a rotograveur. The secretary in the PolSci department, who was old enough to be my grandmother, explained the word to me in the context of Easter Parade.
If we’re doing car models, “Beep Beep” by the Playmates is about a Nash Rambler, which Wikipedia informs me were made between 1950 and 1954. Quite a small production window there. The song came out in 1958.
Put another nickel in
In the nickelodeon
All I want is having you
And music, music, music
“John Henry”:
“A man ain’t nothin’ but a man,
But before I let your steam drill beat me Down,
I’d die with a hammer in my hand. Lord, Lord.
I’d dies with a hammer in my hand.”
Then there’s “Hello Central Give me Heaven” from 1901:
“Hello central give me heaven
For I know my mother’s there
And you’ll find her with the angels
Over on the golden stair”
There’s probably an old folk song out there somewhere about the automated loom. And if we are counting sailing ships, about a thousand songs.
I just thought of two Robert Johnson songs that fit the thread: “Terraplane Blues” about an old car model, and “Phonograph Blues” about a very dated technology to play music.
I’m guessing Wikipedia says that because Nash ceased to exist as a company in 1954. But American Motors, the company formed when Nash and Hudson merged, continued making Ramblers. They weren’t technically “Nash Ramblers” anymore, but a lot of people probably still called them that (like how people continued calling Ram trucks “Dodge Rams” long after Chrysler spun off Ram as a separate brand).
Yes, American Motors kept making the Rambler for quite a few years. The first car I can remember our family had, when I was a small child, was a Rambler. This was in the late 60s.
An intentional dated reference from Somewhere That’s Green from the Little Shop of Horrors movie.
Between our frozen dinner
And our bedtime, nine-fifteen
We snuggle watchin’ Lucy
On our big, enormous twelve-inch screen
That’s a truly huge smartphone you have there. Must be one of the new fancy folding-screen ones. 
Some uses are deliberately ironic.
It I’m surprised no one has mentioned trucker slang and CB radio. Amazingly, my father had one installed in his car for long trips. I never saw the appeal myself. But presumably few Dopers are truckers or fans of old country.
“Convoy” has been mentioned.
Here:
Is there some rule that whenever someone says “I’m surprised no one mentioned X”, X actually will have been mentioned in that thread?