I may be the oldest f*rt to post on this thread (born in 1947), and of course I remember record changers. I did own a Dual 1015 in the late 60's, but never stacked records on it. Rightly or not, I was concerned that it might damage my records: I reasoned that no good could come of dropping a non-spinning LP on top of another moving (at 33 1/3 rpm) LP.