Supersites imo have a disadvantage which should get addressed...
The Browser generally need to download all page content before it displays properly.
If this is technically unavoidable there should at least be some neutral indicator that the Site is still loading.

Currently one gets presented a partially loaded website with missing graphics or disfunctional navigation.
As soon as everything has downloaded the site displays fine obviously – but visitors usually don't wait when
things look broken. I think some sort of Preloader which occludes partially loaded content is really missing.

For now – would anyone know a slim way to include such a thing to a supersite?