I personally use it for shortcuts that I make that I want out of the way… And well… It’s nice to have just in case.
As someone who used a keyboard without one for a while… I really love my numpad.
My numpad definitely saves me time when typing large numbers, and for that reason I always get a keyboard with a numpad. My laptop has a keyboard similar to that hybrid, and after using it for a year, something about the arrow key positions always made me want to press CTRL when going for the left arrow key.