As someone who dailies a trackball, mouse, and trackpad: it depends on the setup. Trackpad is nice for when I’m on my laptop with just one screen. Mouse is nice with two high resolution displays and gaming. And at work I exclusively use a trackball across a triple monitor setup.
Meshtastic has the mesh capabilities that others have mentioned but what’s more immediately important is the ability to direct message others (no need to send private messages to everyone in range) and the ability to share GPS coordinates which is absolutely helpful in an emergency.