It's like bundling metal, rock, alternative, blues, country, and string quartets together as "guitar music." Old schoolers used the term electronica as the umb

It's like bundling metal, rock, alternative, blues, country, and string quartets together as "guitar music." Old schoolers used the term electronica as the umbrella. But eventually electronica shifted to replace "IDM" (intelligent dance music) to mean very electronica-ish music. EDM became a term as EDM went mainstream, starting around 2010. It defines a specific range known for the commercially well-produced electro/progressive house, dubstep, & trap. From the outside, EDM is technically correct. But for insiders, we probably just say "dance music" or "electronic music" as the umbrella.