With handmade designs i think theres more of a personal touch to them, between the designer and the design.
The designs are one offs and unique.
Although it does take longer. But with that extra time spent on making it yourself, it can build value to the product/design.
Designs can be mass produced in less time.
There's less of a waste in fabrics and sources being used.
The downsde being that on computers you don't really have to have gone to university to sit at a computer and create a design, you can just be imaginative. Pretty much anyone can have a bash at it. The value might drop as the design is mass produced and people everywhere would have the chance to get there hands on the design, rather than it being a one off thats going to be worth more in the long run.