This isn't the LED itself. It's the circuitry running current through the light emitting material. Unlike incandescents and fluorescents where the medium itself

This isn't the LED itself. It's the circuitry running current through the light emitting material. Unlike incandescents and fluorescents where the medium itself smooths out poor signal from the circuitry, LEDs show you the quality of the signal going in. Then there's the question of whether the color emission mix is designed so that your eye perceives it as an approximation of a blackbody spectrum. That's an issue of matching doping to our biology and one of those things that I think is just about settled in decent quality bulbs. Once the doping mix and the quality of circuitry is fixed, the incandescent lightbulb is at best an historical curiosity.