I sew most of my clothing from linen of different weights. The only time I used it in a quilt was as backing on a child's quilt. I use enclosed French or felled seams in my clothing to deal with the ravelling. Occasionally I will serge on curved lines, but not always, because the enclosed seams look more finished. Both methods hold up to frequent washing.
Linen is not as stable as quilting cotton. It has a lovely fluidity that is greatly diminished with quilting. I have seriously thought about sewing a pieced linen coverlet made of large squares joined with felled seams.