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

@pryso - Tone controls have come back relatively recently; you see them on quite a few newer, very expensive, high end preamps and integrateds, and they can be completely removed from the circuitry if they're not to be used. Usually just bass and treble, but I've seen some that have a 'Mid' adjustment, too. 

100% agree with the OP.

engineering is advanced enough to deal with the SQ level.

I was going to suggest the ability to stack multiple LPs on top of each other and have them drop when the prior one has finished.

But I won't, because then it would have to adjust the VTA.  I am, of course, joking, because the record clamp issues would be tough to solve. No I am not serious.

It pisses me off that pressings from the 60's and 70's often have sides 1&4 on one disk and 2&3 on the other - or even worse 1&3 and 2&4. And it gets really crazy with multi disk opera LP sets.

Re tone controls: many DACs have multiple filters and choices of sample rate conversion or DSD conversion.  And we do choose our interconnects and roll tubes to get the sound we want.

I remember my British Quad 33 preamp from the early 70's had bass, treble and slope controls and I think the current ones do also.

Currently in production are fully automatic turntables from Projct, Dual and Thorens. There are semiautomatic or to lift/shut by Music Hall, Teac and Technics.

 I am an infrequent vinyl listener so I stick to vintage auto-return tablets that don’t require significant repairs beyond DIY. I am using a restomod Philips AF877 with some upgrades. Love the auto-return.