Got your point about Type-C connector.
About the palm rest area. I haven’t heard about the negative tilt on the keyboards before. But in my experince (#anecdotalevidence), It’s more comfortable to have keyboard (laptop) slightly up and not horizontal. When the laptop is horizontal, I tend to notice that I feel uncomvortable and sometimes there’s even some pain in the wrist area.
This is basically how your hands are positioned while typing:
. And I’m not sure it’s the best way.