Half speed mastering

Half speed mastering.

I had never heard of it, but apparently its to do with cutting to vinyl athalf speed for better harmonic quality.
Sounds cool!
Discuss and enlighten me.
Cheers
E

If you are cutting vinyl, you can get better precision with the same gear if you do it at a lower speed. Just seems like a simple, effective way of making better use of the hardware that already exists, so long as the lower speed isn’t costing you anything.