So, as a UNIX hacker, here's what I don't get about the iOS community. There is way too much excitement over the simplest things ever. Let's break down some of the copy for this app: Prompt is a clean, crisp, and cheerful SSH client What does that mean? What does a clean ssh client do; not commit any protocol violations? What is crisp? When you bite into it, it's like a ripe apple? What does cheerful mean? Is the ssh…
Many Mac users geek out on user interfaces that are sparse and simple and uncluttered - this is the audience to which this SSH client is pandering so it's no surprise that they're marketing it that way.
In reality, most typical iOS users (not the same as Mac users!) want something functional that gets the job done and don't really give a hoot about having the app 'get out of the way' or be 'crisp' (and the AppStore top seller lists would seem to indicate this), which, as you have mentioned seem to have little meaning for a Unix command line crypto/networking/admin tool.