[burner420042]

The number of buttons on ergonomic mice is excessive. More than 3 is too much. So I'm sitting there wondering what else you could use them for: a random squiggler to keep the mouse moving and your monitor active when you want a break.

[supriyo-biswas]

I had a Logitech ergonomic mouse and by default, the two extra buttons corresponded to forward/back, and I had gotten quite used to them for navigating codebases. It's a shame the mouse didn't last long, though...

As for the squiggler, put a wrist watch or something underneath it?

[aaviator42]

When doing image editing and text copy editing, I find it very handy to have mouse thumb buttons mapped to copy / paste / cut / undo / redo / delete / shift / ctrl. Allows me to do a lot more with my mouse when I'm using it anyway to do stuff, without having to switch back and forth repeatedly with my keyboard.