Hypothetically speaking, if I was to purchase the Sonnet eGFX Breakaway Puck for use with a 2018 MackBook Air, could I put the MBA in clamshell mode and connect two 4K displays to the puck? Would this give me satisfactory performance for everyday desktop tasks (no games or video editing; perhaps some light photo editing/viewing). I am unclear about the need for applications to be eGPU enabled. In my hypothetical scenario, would the eGPU be used for displaying the desktops or would it use the built-in video? TIA.