It's definitely not necessary. It can be convenient.
It wouldn't be very high on my list of wants, but I'll use one if available.
My problem was not using the thing for long periods of time and it kinda jamming in place. They have a little quarter-inch hex key hole on the underside that you can use with a hex key to get 'em going again if that comes up.
That specific keyboard may take some doing, but I suspect that you could get Cherry key caps in those colors, if it's the color aesthetic you like.