Well - there are 2 obvious components to the electronic conundrum.. which results in 3 specific items…
The Sensor vs. the Digital tech… And the Analog to Digital converter in between.
The sensor tech improves a great deal and is much more consistent - so the 500 scales are now capable of repeating .02 grains of accuracy.
The electronics do have a bit of a “saturation” issue in terms of being turned on for a while, but the tech is so advanced you are typically fine here.
At the end of the day a 500+ scale will get you there to .0x grains
