Happy Days was big, and was set in the 50s while being from the mid-70s... but, I'd argue it could have been the early 50s, the show was on for over a decade, and AFAIK it wasn't an immediate hit (though it also didn't have the Fonz at first); also, FWIW, there was also a big nostalgia boom in the 70s that was focussed on the 40s (see the video linked below), so I would just lean on +/-5 years as why we see little discrepancies.
"[A behavioral scientist we asked about this] determined that we are not really all that happy about the present, we are terribly uncertain about the future, and when we talk about the old days we always refer to them -- I suppose because of our collective memory -- as the good ol' days; and, I guess, really, when you go back, you really can select the better parts of the good ol' days... like the music." -- a radio executive in the 70s
And honestly, I don't think there's a lot to be nostalgic about with semi-modern tech. The hardware is a bit faster now, but looks and works the same as a machine from 15 years ago. Windows Vista is almost 20 years old by now, and is functionally virtually identical to Windows 11: some stuff got moved around and the whole UI got a dash of paint, that's about it. Games like GTA, CoD and FIFA got flashier graphics, yet are identical gameplay-wise. Want to play something novel like Portal? Just install it on your 2024-era machine via Steam.
People aren't going to be nostalgic about 2000s or 2010s era computing for the same reason very few people are nostalgic about toasters.
There's definitely nostalgia around MP3 players, iPods, or early smartphones, though! Those were still novel, had a lot of variation, and were genuinely world-changing to people.
I’ve got a counterfeit Athlon XP on the wall because it amuses me.
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or some other manifestation of the fdiv bug on it. Funny stuff.