For me it's not coolness it's just context, 16:9 is too short to fit enough lines and scrolling and jumping is as annoying as tabbing in and out.

This is also one problem with ereaders for me, especially for anything technical. With paper when the textbook says refer to fig 13.2 or we covered this in section 4.3 I can just flip to that page with my fingers as a bookmark, read it, and go right back. Just not as tactile on computers. Even if you did like lsp assisted jumping all over the place you quickly forget what the heck was going on and where you came in from.

Of course maybe someone will come and correct me but this is just what I experience. It's still better flipping pages for technical stuff. It's like scribbling a DJ disc, imagine doing that with a mouse or keyboard. It's just… different.