Every other media at the time required some maintenance to sound good. Records would scratch, those tape pinch rollers would need to be cleaned. Nothing was easy, cds were (skip forward with a button push). Cassettes still were the only way to record, better for portability and sounded pretty good (we did some a:b testing cd vs cassette as kids).
Late 80s, cds were everywhere. I stopped buying records. At my highschool radio station someone got a ton of great records from his neighbor who was replacing with cds.
My friends dad who liked jazz did lament that a lot of the jazz he had in record form would never be re-released as cds. Not digital so a lot of music lost to time and a format change.
AAD == Analog recording, Analog mastering, Digital media
ADD == Analog recording, Digitally re-mastered, Digital Media
DDD == Digital recording, Digitally re-mastered, Digital Media
This is known as a SPARS Code: https://en.wikipedia.org/wiki/SPARS_code
Your dad's friends should have imported from Japan --- they were big on Jazz, and a lot of my Jazz CDs have spines labeled in Japanese on one side and English on the other.
History repeats itself: right now you can now buy loads of CDs for cheap on eBay.
https://www.youtube.com/playlist?list=PLv0jwu7G_DFWBEyCKt4tK...