Isn't mirroring still a thing? I am not saying this as the old creepy guy (well a bit), but seriously wondering why a registry like npm doesn't have tons of geo

Isn't mirroring still a thing? I am not saying this as the old creepy guy (well a bit), but seriously wondering why a registry like npm doesn't have tons of geographicaly spreaded mirrors. Package can easily be signed and mirrored, that shouldn't be complicated.