Trackball vs a Regular Mouse- When and For Whom?

Logitech ERGO M575 Wireless Trackball Mouse - Easy thumb control, precision and smooth tracking, ergonomic comfort design, for Windows, PC and Mac with Bluetooth and USB capabilities - Graphite

MOUSECHESTER DERBY: Mouse on the pitch at Old Trafford

Tiny zoo mouse gets Guinness World Record for longevity at over 9 years old

I'm irrationally excited for this trackball gaming mouse