[sneak]

IBM Plex Mono Ultralight is a joy to look at on a high DPI display.

[mrweasel]

Do you mean Extralight, I can't seem to find the Ultralight. It's probably just my eyes getting older, but I start to prefer chunkier fonts and 18pt.

Plex is a beautiful font, and one of the few corporate fonts that I actually think works, while being recognizable as being IBM.