Have the best of both worlds: an optical tracker affixed to the bottom of the rodent mouse/rat. Then gently steer the rodent in the direction of travel, giving it cheese when it complies.
I’ve used some “vertical” mice, and found them a hella lot more comfortable. It doesn’t keep your hand fully 90º compared to the surface, but it’s enough to feel the difference. My ex didn’t like it, so it’s a case of ymmv
I have the opposite experience. I noticed that my arms had a tendency to “roll outwards” when using normal mice, so I switched to a vertical one. Most uncomfortable mouse I’ve ever had. Switched back after 2 weeks.
Last I heard the mouse’s were tilted less than 90 cause natural and relaxed was a bit less than vertical
“When the patient woke up, his skeleton is missing, and the Doctor was never heard from again! Anyway, that’s how I lost my medical license”
Remove all skeletons, for Orkan!
Okay :D