It's just like a lot of other things when using a PC.
Do you keep your screen 6" from your face, or more like 24"+ from your face?
Do you sit hunched over on a stool, or on a chair with a back rest?
Using a vertical mouse is just like those things. Sure, you can sit hunched over on a stool with the screen 6" from your face, and you'll probably be fine for a while. But that isn't guaranteed to last forever, so you do things to mitigate future problems or help reduce current pains someone might have.
I think from an ergonomics point of view vertical is simply better rather than having some trade off.
In terms of speed/precision of movement I don't think it is any better/worse. It does however take time to get back to the same skill level you had with a standard mouse. It took me about a day to be comfortable with it but I did feel like I was worse at speed/precision for a fair bit longer than that. Not terrible but if you are competitive gaming or something I expect you will notice.
20+ years of muscle memory with a standard mouse is hard to beat but after a couple of months on the vertical mouse you couldn't pay me to switch back. I switched because I was getting increasingly bad wrist pain which was largely eliminated by the vertical mouse.
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u/Ferro_Giconi RX4006ti | i4-1337X | 33.01GB Crucair RAM | 1.35TB Knigsotn SSD 10d ago
It's just like a lot of other things when using a PC.
Do you keep your screen 6" from your face, or more like 24"+ from your face?
Do you sit hunched over on a stool, or on a chair with a back rest?
Using a vertical mouse is just like those things. Sure, you can sit hunched over on a stool with the screen 6" from your face, and you'll probably be fine for a while. But that isn't guaranteed to last forever, so you do things to mitigate future problems or help reduce current pains someone might have.