Dream Theater has a string of 4 albums (over 6 years) in which each album starts with the soundscape from the end of the previous album. The last album in the cycle, Octavarium, musically and thematically finishes in a loop, connecting the end of the last song to the beginning of the first.
If memory serves, I believe record players that could flip the records were contemporary to the release of The Wall. My parents didn’t have a flipper but they had a player that could play a stack of records and The Wall was the first or second LP try bought to play on it.
That definitely works on an auto reversing tape deck, which it looks like existed for fifteen years prior.
Sharp made an auto-reversing turntable, it played both sides, front-loaded like a CD player. I have never seen one, despite being an old guy who is of that era. There were but a handful of turntables that could do this, so that’s a lot of production effort for a joke but a few were equipped to get.
There were a lot of eight tracks during that time, though, so sibling comment is more likely correct.
