> There’s another cat space on the underside of the desk surface, in the normally unutilized space in front of your knees when you’re sitting.

Yeah… If you're of a typical Japanese length. My knees appreciate all the space they can get, and that very much includes the bit of 'unused space' where a cat can go in the article.

(Living in Japan as a student really made me feel like a two metre tall giant at times. Classroom desks at Japanese universities were universally too small.)