Summary of Reddit Comments on Ergonomic Mice

Recommendations:

Some users suggested Logitech MX Vertical for those experiencing wrist and shoulder pain: "I have a Logitech vertical mouse and I like it a lot. It’s helped with wrist and shoulder pain."
Logitech MX Master 3S was favored by users for general use and clicking a lot: "Take a look at the Logitech MX Master 3S."
Mad Catz 8+ or 8+ ADV was mentioned to have an adjustable design that can fit unique hand sizes: "Mad Catz 8+ or 8+ ADV cured me, no issues anymore."
Razer Viper V3 Pro was recommended for its ergonomic, lightweight, wireless design: " Imho the Razer Viper V3 Pro is currently the best one."

Trackballs:

Logitech MX Ergo and Kensington trackball mice were praised for reducing wrist strain: "Trackball is the way. I have a lot of wrist issues, and it's been the best purchase I've made. I've tried a few and prefer the Logitech MX Ergo."
Trackballs were commended for minimizing carpal tunnel issues and providing precise movements: "Both are ancient… I use a trackball to this day."

Other Recommendations:

Rollermouse by Contour was mentioned as an effective solution for wrist issues: "Rollermouse by Contour...the best...spent the insane $ to buy one for home."
JLab JBuds Ergonomic Vertical Mouse was suggested for gamers due to comfort and precision during long gaming sessions.
Anker vertical mouse was recommended for reducing carpal tunnel pain: "This Anker is a good starter vertical mouse."
JLab JBuds Ergonomic Vertical Mouse was highlighted for comfort over long gaming sessions: "Take a look at the JLab JBuds Ergonomic Vertical Mouse."
Delux ergonomic mouse was favored for being lightweight and comfortable: "Delux ergonomic mouse...super mura compared to logitech."

General Tips:

Ergonomic Mice are most effective when used in an ergonomic sitting position with proper posture to reduce strain on the wrists: "Ergonomic mice assume you are at least somewhat close to a standard ergonomic sitting position."
Exercises and stretches for wrists are recommended in conjunction with ergonomic mice to prevent discomfort and injury: "You need to do stretches/exercises for your wrists, there's no gear that can fix it."
Adjusting sitting/desk height is crucial for proper ergonomics, more so than the shape of the mouse: "Fix your sitting/desk height, so your arm is level with the mouse."

Not Recommended:

Some users expressed mixed experiences with ergonomic mice: "Bought one and it's just awful and haven't particularly felt it improve anything."
It was emphasized that ergonomic mice are not a universal solution and may not work for everyone: "This doesn't mean that they are a solution for everyone."

Overall, the Logitech MX Vertical, Mad Catz 8+ or 8+ ADV, Razer Viper V3 Pro, and trackball mice like Logitech MX Ergo and Kensington were popular choices among Reddit users for addressing wrist strain and discomfort. It's important to consider individual preferences and ergonomic needs when selecting an appropriate mouse.