The middle button (or "mouse button 2") is a legit pointer interface function that many apps use. Besides scrolling, it pastes, opens links in new tabs, and man

The middle button (or "mouse button 2") is a legit pointer interface function that many apps use. Besides scrolling, it pastes, opens links in new tabs, and many application specific uses in eg Blender. (But there's always been a middle button challenged user population subset around so apps have alternative ways of doing these, a bit like terminal apps can be used without a working meta)