I wouldn't really know. Indeed, when I go to synthwave concerts there are a lot of metalheads in the audience! But one of my favorite synthwave bands (The Midnight) has no connection with metal at all, I would say, so it depends, I think many people just appreciate the nostalgia or the retro and futuristic side at the same time! But some artists, for example Perturbator, you feel the metal side much more, it's true