> It's also why violins don't really go with rock music.

As a lover of violins in metal, I disagree, heavily. They are very common in folk metal (e.g. Isenmor with 2 violinists [0]), but also many other genres, including more underground ones (e.g. Exulansis where the violin is the focus [1]) use them. Even when there’s no violinist, there are quite a few bands that add them synthetically.

[0]: https://isenmor.bandcamp.com/track/drink-to-glory

[1]: https://bindrunerecordings.bandcamp.com/track/of-nature-hatr...