It is up to what the customer wants.
I don't notice the computer going over stitches any more than I would do it free motion.
The computer allows for each design to be perfect, to fit into each block or an overall design or a mixture of designs. It also makes it easier to remember what design was used in the beginning and make it exact in the end. This is helpful when there is a span of time between start and finishing of the quilt.
Computer designs can be adjusted to fit large areas or smaller areas and keep the design perfect. (Although some designs look better larger, some smaller). So you can have it quilted as open or as tight as you like.
I can also program my computer system to be on point or on square, and fit in any space the customer and I agree on.
There are so many designs available for the computer systems if you have an idea of what you would like on your quilt there is most likely a pattern for it.
Hope that helps.
Phyllis
aka
QuiltingGrannie
Quilter's Pantry