I've had two separate users tell me that they use a mouse and they can't my scroll tables horizontally without first scrolling to the bottom of the page.
I like a UI that lets you scroll in every direction by clicking and holding the middle mouse wheel/button down. This is a more precise gesture than any trackpad can offer. Plus, with a vertical mouse you won't be killing your rotator cuff.
In web browsers this is referred to as "auto scrolling" and it works automatically on Windows but on Linux I have to install a chrome extension to get that feature in Chrome at least. It works in Firefox.
Not sure if it works on my Mac because I gave up trying to use third-party peripherals on Macs since they never work well.
It's a precise gesture, meaning that it happens when you want it to happen and not any other time.
I certainly cannot say the same for scrolling with a trackpad. If I happen to brush two fingers on the thing, things start scrolling when I don't want them to.
I can scroll horizontally on my touchpad, but on a mouse it doesn't work. Horizontal scroll wheels are rare (the Logitech Master series has them, but that's about it). Most apps allow you to hold ctrl while using the scroll wheel to scroll horizontally. Some implement some kind of drag-mechanic, but that feels incredibly awkward with a mouse and is unusable with a touchpad.
On some mice they do, and it's a really useful feature. But it's fairly niche and mostly on the more expensive mice. I would feel pretty confident betting that over 99% of Windows users don't have a tiltable scroll wheel.
Even though I have trackball with tilt wheel (MX Ergo), I noticed that I never use them. When I should scroll vertically, I just middle click and move cursor, or grab scrollbar and drag. Maybe because tilting wheel isn't comfortable way to scroll.
