The biggest current reason is fashion. Tools like Claude Code did it, and while they actually had good reasons to run in the terminal, the tools' popularity and wildly different look, especially to non-terminal-native users became a signal of some positive sort.

I don't believe that any of the rationale posed in the article is a popular reason developers are using.

Failing projects over bad UI teaches fear, not design. Good interfaces come from iteration and feedback - which is exactly what user-centered design is about