None. Everything that works in Threejs should work here without exception.
If you find something that doesn't work, please write a Github issue so I can help you.
Does Norska have to be updated every time Threejs is ?
No, Norska uses Threejs dynamically, with little or no overhead. Unless there's a radical change in the Threejs API, Norska should work without needing to be updated.
To make this documentation easier to understand, I'll use directive to refer to HTML attribute names beginning with x-3, and props to designate its value.
When talking about x-3.color="'red'", x-3.color is the directive while 'red' is it's prop.