My main gripe about changers...
When the new record drops down on top of the prior record, it is not spinning but the bottom one is! It takes a second or so to get up to speed and, in the time that it effectively "clutches" up to speed, it grinds any foreign material on or between the two records into one or both of 'em.
Now, you know that just ain't right
There's very good reasons these fell out of favor. This is where CD changers are really, really great.