Why hasnt a turntable manufacturer produced a table with automatic tonearm return/shutoff?

The spindle stackers were terrible because the records would get scratched when one dropped on another. as others have said, I think there are some decent semi automatic tables, but all that I know of that claim to be high-end are manual. I don’t mind getting up to turn over the record, but old men, at least this one, tend to fall asleep, listening to music and that’s a problem

the little fwend worked about half the time for me, but that likely had more to do with my ineptitude than the product

Personally, I prefer to have as few things in my turntable that can vibrate and adversely affect the sound - I also remove the dust cover when playing records -  plus, if it was a big deal for me to have automatic turnoff and return, I'd listen to CD's or stream instead. 

But I remember the old spindle stacker days when I was a teenager. I also often didn't bother putting records back in their covers back then! 

A lot of audiophiles assume something like you describe would add noise to the system (while have no evidence) but are happy to have monoblocks and all the connections that go with them. Go figure.

Concept 2QD is a really solid table and does just what you speak of…😎

@roadcykler 

monoblocks and all the connections that go with them. Go figure.

You mean that pesky additional power cable?