I'm all in favor of compact displays; and these borders are much nicer than the box-drawing characters.

But... "nicer than box-drawing characters" is such a low bar. The semigraphics are right there, and can be beautiful! They've been part of DOS (cp437) since the very beginning, and Unicode has a more-than-adequate variety.

Here's my afternoon's experiment: `prtty`

https://github.com/hughpyle/prtty