Jimmy, I'm 60. My parents had a mono console when I was very young and I have no memory of it, but I do remember the notable upgrade when they got a modest Pioneer component system. It had either a manual or auto return table. My first exposure to changers was in college when friends had Duals, Miracords, Garrards, and BSRs (and the occasional Glenbrook). I didn't get the need for changers then, any more than I do now. But records played on them didn't appear to wear any more than those on the used Pioneer PL 12d which I picked up partway through freshman year.
And by now, most of my records (which I used to obsess about so much that I gave away a record that some philistine (my brother) had 'ruined' by playing it twice in the same day -that's what I'd been told by Transcriptors ads, I think), are very well used -- either they are the ones I bought in 1973 and on, or found at tag sales, used record stores, Salvation Army, or, the largest portion, at the dump. Some aren't good (and essentially no old copies of Surrealistic Pillow are playable -- too much dope and bong water involved in their playing). But most are fine. Warps are a problem (sitting out in the sun at the dump isn't helpful), but otherwise, even a quick wash in the sink usually makes them reasonably, or perfectly, satisfying to listen to. Given the ubiquity of BSRs in the era that my music tastes dwell in, if changers damaged records, they'd sound terrible. Maybe the music has it's imperfections (why did I ever listen to Thick as a Brick?), but it's not because of stacking.
Certainly my hearing isn't what it used to be, but I can still easily hear differences between good components.