Ask HN: Does the Unix terminal have good UX?

Unix is user friendly. It is just picky about who its friends are.

typing `yes` in most terminals produces an endless loop of y-s

You're confusing the action of a specific app ('yes') with the general term 'good UX' that you're trying to associate with a UNIX terminal.

What is your definition of 'good UX' when applied to a terminal? (Any terminal such as those in UNIX, Windows, MacOS, etc., etc., etc.)

For their intended purposes, they have great UX once the learning curve has been tackled.

Common operations are several times more quicker via the terminal if you know what you are doing.

User experience (UX) is designed, created to provide meaningful efficient work to user

It is on Linux, indeed, does qualify