Hot take: running a face mill at 60% stepover beat the full-width passes my old lead insisted on
He had me burying a 3 inch cutter across the whole 6 inch plate on the Haas, and it chattered so bad we had to babysit the spindle load. Went to a 60% stepover at the same speed and the finish came out clean enough to skip the grinder, so now I'm wondering how many other 'rules' from that shop were just habits.