LP's... Do they sound better now than 30 yrs ago?

Far better now.

First, ultrasonic cleaning systems are readily available. If you haven't heard an ultrasonically cleaned record on a good system, you have no idea of the potential in terms of silent backgrounds and micro-detail. See the Rushton thread.

Second, playback systems today are far superior to what was available 30 years ago. There have been several revolutions since then: air bearings, tangential tracking, amorphous core step-up transformer technology, exotic stylus shapes and materials. Also, there is a widespread understanding of the benefits of precision set-up. Who ever heard of a torque wrench for cartridge mounting screws back in the day?

Bill Gates' system of 30 years ago can't compare with my modern one. Period.

Engined, I don't think so. Line contact is now commonplace. One piece integrated diamond cantilever is available. The best amorphous core step-up transformers from Lundahl are of superior quality. I tried Koetsu transformers from 30 years ago, and they aren't even close.

Grant you that phono stages are much improved, especially solid state, now that more people can design with complementary devices.

Engined, thank you. I had no idea that anyone had produced a one piece diamond cantilever/stylus before. If Koetsu has not evolved with stylus shape or platinum magnets, then a similar cartridge was available 30 years ago.