Yeah the scroll wheel was a big quality of life improvement when it came in. I wouldn't want to do without anymore. Though I mainly use pgup/pgdn to scroll. I wish the keyboard had a big scroll wheel. Some 90s keyboards did, like a big rod. But now if there is one it's for volume control only.

Scroll wheel tends to be quite slow compared to dragging the scrollbar for large views so they really don't replace each other.

really? what about really long pages? I frequently have to grab the thumb and because the scroll wheel takes ages