I think I've only put borders on one quilt by choice, a couple others by demand, and never sashing. Borders are not at all suitable for the designs I make and would do nothing but detract from the overall feeling of the quilt. They should only be used when they add to the design and never considered a necessary frame of some sort. Way overused in my opinion...a very 'cookie cutter' habit.
I'm delighted to see less of them.