I was discussing this same subject with a small business specialist. I was thinking of opening up a quilt shop in our community when I retire and he suggested it was not a good idea. He said people my age only quilt and the younger generation is not interested. I don't agree with him at all.
You only need to go to quilt shops/big box stores and look around. I yet to go to a quilt shop that isn't very busy with all ages. I don't think there would be so many excellent resources available (and growing) if this were the case. I've even gotten my granddaughters interested in quilting and I never thought that would happen! Quilting lives!