[ljw1001]

>making a GUI requires front end/backend development, UX, visual, research,

Doing a CLI also requires, at least, back-end development and research. Doing a decent one requires a tremendous focus on UX.

[thothsscribe]

Definitely back-end and it is exciting to see all that UX is bringing to CLIs, but relative to a full front end GUI it is much more straight forward. (Not to discount the hard work CLI developers do since it is still plenty complex)