For me, a couple of years ago a vertical mouse almost instantly solved my RSI which I only once had severe before in 40+ years of computer usage (that was due to physical work, though they attempted to gaslight me into being a heavy computer user). Using a mouse, trackpad or trackpad meant trouble. Slowly, it healed, and I can once again use a trackpad. But nowadays I do not use normal mice anymore for any prolonged tasks. Only my vertical one. I had a different one before the Logitech one. Some cheap ass brand. It worked well for a couple of months of heavy usage and then it had hardware malfunctioning. I went with the Logitech and years later still goes strong, with a couple of weeks of battery life.
You're wrong regarding mice being always superior. Mice have their place, and I am not the only person who has benefited from vertical mice (there is a learning curve, btw). Mice have a severe drawback: they need more physical, flat, clean space than the other pointer solutions. Try a mouse with a cyberdeck and tell me how that worked out. I've done pentesting tasks with a small laptop the size of two mice. I would not be able to do that outside on the go with a mouse. I also had situations where back in the days I had no space for a mouse, so I used my trackpoint.
