A lot of the things I'm using are generally hangovers from those low bandwidth days. I've opened a file and I know what I want is a way down? Not a problem 10-Page down to move 10 pages down the file without sending all that to the terminal.
What to cut the next 5 lines into the buffer? 5dd. Move to the line you want to paste to. Want to remove the next 5 characters? 5x. Often on a slow link moving your cursor along had a delay. But if you knew how far you needed to go you could do 30+arrow right to get the cursor to move directly there.
I think most are obsolete now, but I'm still used to using them out of habit mostly.