Glues in aircraft construction go back all the way to the beginning. Wooden parts needed to fit exactly, however, and nails were used in addition because the early glues were far less tolerant of less than perfect workmanship.
Nowadays, there is a glue for everything, and if used properly, can yield outstanding results.
I am currently building a wooden wing biplane. T-88 epoxy is used exclusively on the wings and I used just a small number of nails. Most were used to temp hold parts together until the glue cured, then were removed. T-88 is STRONG and a properly made joint will fail anywhere but where the glue is.
I am sure you could bond together most of the RV parts with some sort of adhesive / metal bonding technique. It would probably be alot heavier but you wouldn't have those pesky rivet lines. For that matter, just go out and build a glass plane.
Riveted structures in aircraft construction are more and more being replaced by composite / bonded structures.
The press refers to the B787 as a plastic, glued together aircraft. Yes, there are still lots of special fasteners used to help hold it together but far less than before.