Think commercial. My company invested in a local rig since privacy is important to our customers and sometimes I want to use these models on private data.

Even in that case it would make more sense to put the hardware in a server rack shared with everyone rather than inside macbooks.

At any rate it makes a stolen backpack or spilled drink a lot less damaging.

Obviously the rig is not a macbook but indeed a server rack. I'm just saying that we're using this model for local development.