I don't entirely agree, especially since the assets are only loaded as links... the thumbnails are loaded, unless I'm mistaken. It's very lightweight and convenient. On the contrary, I'd like to have a whole catalog of PBR materials like this one, without having to manually enter each map. The catalog is available, for example, at https://3dassets.one/?q=&license=any&sort=latest, but we're not going to ask Thomas to do that work again.
Furthermore, the size and presentation of the materials is rarely done this well in a rendering program. Just take a look at V-Ray.