[SVG supports animations](https://css-tricks.com/guide-svg-animations-smil/) as well, so that's not much of a point. But yeah, I guess it's a matter of what you prefer. For "finished" assets such as logos, I prefer to have things as separated as possible, since they are usually final and just need to be included in the page, so I don't see any point in defining them in my CSS.

Especially because a designer might tell me to replace the logo in a year and I don't want to rewrite all the CSS for it if I can just replace it with a new SVG he will provide ;).