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Did that era have laserdisks? I thought they were more early 90s. Of course the first fight was VHS vs. Beta.
Look, learn your tech history and stop making me feel old 
Seriously, the laser disk first came out in the late 1970s IIRC and was quickly adumbrated by both varieties of the video cassette. For reasons I have never been able to discern it made a comeback in the early 90s, as you stated, and was just as quickly replaced by the DVD.
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"All my years in p*rn didn't quite prepare me for childbirth. I mistakenly thought all the stretching I did would make this easier."