So what? Neither are desktops! The question is that the total number of terminal users is certainly increasing year after year.
Perhaps, but the proportion of them is certainly decreasing (especially if we include devices like tablets and phones in "computing interfaces").
What does that even have to do with this article, which is about a file picker?
Several years ago, I started turning desktop icons off (both GNOME and Windows make this easy) and it really helped my organization, as I was then forced to competently organize files into Downloads, Documents, Pictures, Videos directories instead of vomiting everything onto the desktop. Simply _knowing_ where files are located is faster than scanning a cluttered desktop.
As a bonus I don't ever have to worry about the positions of my desktop icons changing.
File picker definitely needs thumbnails though.