The grinder camp (Hoffmann, Lance Hedrick)
Argument: a great grinder + a mid-range machine produces better espresso than a top-tier machine + a mid-range grinder. The grinder controls dose, distribution, and extraction consistency — the three variables that matter most. They're not wrong. Niche Zero, DF64 Gen 2, and 1Zpresso K-series are the consensus picks under $700.