The linked video looks like it follows mobile/web styling though, it feels like if you could run a modern mobile-first web site through elinks. Sure there aren't pictures (which is really the least of modern GUI issues) but everything looks "flat" with big sizes (e.g. scrollbars) and aside from background color there isn't any other distinction between elements. Compare this with, e.g., the Debian textmode installer (which i guess is based on the Newt TUI library) or the console version of Yast in openSUSE (which is based on libyui, itself using ncurses for the console backend). In those the elements are very clear (though Newt's buttons are a bit too big IMO), scrollbars are thin (perhaps too think for libyui) and everything has a clear border.
Also no scrolling areas inside scrolling areas, which is always annoying.
Also no scrolling areas inside scrolling areas, which is always annoying.
[0] https://news.softpedia.com/images/reviews/large/debianinstal...
[1] https://documentation.suse.com/sles/15-GA/html/SLES-all/imag...