@oldguydoesstuff
I’ve found that trackball keyboards are mighty useful for working on servers or raspberry pi’s. While an original PS/2 M5-1 or M5-2 would need 2 USB adapters to do that job, the modern black Unicomp you see in the first photo is natively USB and has an internal hub so you only need to find a single free port.
That being said, I daily the trackball model because I can.











