I admin a very large forum (22M posts, 300+ forums), and one of the complaints we've had since our migration to Xenforo is that the individual forums don't have their own styles anymore. I'm thinking about importing all of the old styles we used to have, but there are a lot of them. Our site is about 17 years old, and there are probably close to 900 individual styles.
These would all be children of our main style, the only differences being the graphics used and some basic CSS. But I'm curious if there would be any sort of performance issues with having that many styles imported. Thoughts?