Thunderbolt 3 ports are multipurpose: disks, external GPU's,etc. Just because you have 3 of them does not mean you should plug in a monitor to each one. And if

Thunderbolt 3 ports are multipurpose: disks, external GPU's,etc. Just because you have 3 of them does not mean you should plug in a monitor to each one. And if you really need 4 screens that eGPU will probably handle it.