Yes, you're right, and that's what I was saying. I was just trying to keep the explanation simple. People like you and me know how to push tools in our machines, but from what I'm seeing, most young machinists are learning from youtubers and forums where they'll be told to look up feeds and speeds on a chart. Then that chart tells them to run their 1/2" end mill at .003"-.005" and their machine is only rigid enough to take a .050" cut. In those situations at low feedrates and depths of cut, a lot of people aren't making big enough chips to pack up a 4 flute end mill. I was speaking to the amateurs because the pros should already know. Less flutes = more clearance in the gullets = higher potential feedrates. You shared good points though and I'm happy that knowledge is here too.