the tonearm hit the runout on the album we're listening to and I realised with a start that vinyl must inherently have "lower" audio quality (not that I have ever been able to tell) towards the end of each side and yep, "inner-groove distortion" is a thing, there are simply fewer millimetres per second of groove as you approach the centre, given they operate at a constant angular velocity. Akin to running magnetic tape at a lower speed.
I'd never really thought about it before. clearly it doesn't matter that much outside of audiophile placebo effects given that 7 inch records exist and sound fine, but still
now imagining a world where computerisation of record players in the 80s and technology from LaserDiscs resulted in constant linear velocity records proliferating and now you have another toggle switch