I send the vast majority of my quilts to a longarmer to be quilted. I have done some very simple basic FMQ on my featherweight but they were smaller wallhanging-sized pieces.
I know myself and my quilting/sewing skills well enough to know that if I didn't have them LA'ed I'd probably never finish a quilt. It used to be pretty darned expensive with a very long wait time to have things done by a long arm quilter. That has changed in the past 10-15 years as more and more LA quilters are popping up - at least in my area.