One of the often overlooked facts about LP reproduction is that some people prefer it because it introduces distortion. The "warmth" that many people associate with LPs can generally be described as a bass sound that is less accurate. Reproducing bass on vinyl is a serious engineering challenge, but the upshot is that there's a lot of filtering and signal processing happening to make the bass on vinyl work. You take some of this signal processing, add additional vibrations and distortions generated by a poorly manufactured turntable, and you end up with bass that sounds "warmer" than a CD, maybe-- but also very different than what the artists were hearing in the control room.