I'm currently working on some answers on other stackexchange sites ( specifically Ask Ubuntu and Unix & Linux ), where I'm utilizing a few command-line utilities or shell programming constructs which at first sight might be overlooked as having no effect or are not useful. However, with a few example cases and relevant context, it becomes apparent such commands/constructs can have a value. So I am looking for a phrase or expression that would allow me to succinctly and positively put in the title/heading of an answer what I expressed in the previous sentences.
I have come accross Does 'all but useless' mean useless or useful?, however "all but useless" seems to be more negative and "all but" seems to serve as negation of "useless" in absolute form. By contrast, I am trying to convey that a construct might be useful in certain cases/context.