ETA: I realize that may come off as snobby, not my intent. My point is most people wouldn't know the difference and don't want to make a major investment in a grinder. I personally have $8K invested in coffee equipment and every high end toy imaginable, but that's me. I cannot tell the difference for FP between my Mazzer and whirly blade grinder. For pourover, drip, and espresso there is a difference, especially the former two. The main difference being the extract time and contact with coffee/water.