CLI and JSON would be amazing if terminals made a step forward too. Because both raw json and triangled in-browser console json logging just suck for daily reading. A new terminal could either detect patterns or use explicit cues in json to format structures, and show raw data on demand. E.g. this json5: [{_repr:"ls:file", name:"foo.txt", type:"text/plain", size:512, access:"664", …}] could be presented as usual ls does, but processed further as json. A whole lot of representations (and editors) – including ui-based – could be added to the system (e.g. /usr/local/share/repr/ls:file (+x)) to format any sort of data, instead of formatting it in-program with getopt and printf. And when there is no repr file, well, you still have triangles mode. We’re too stuck with text=text=text idiom. Structure=text=ui would be so much better.

(I’m aware of powershell and am ignoring it consciously)