It may be off topic, but this discussion of turntables and the variability of vinyl record quality is interesting!
Which reminds me of this: Back in late 2020, I bought on eBay a box of ~200 45s that were allegedly from a defunct Top 40 station someplace back east, and the quality is variable.
Some are in pretty bad shape with lots of noise (the popular ones, I'm surmising), but then there are some that look like they'd sound bad, but they actually sound quite good (better than I can find on Youtube or Amazon Music).
Maybe those were backup copies that never got played?
c