Antonyms for the phrase "was current" include phrases like "outdated," "obsolete," "archaic," "old-fashioned," and "antiquated." These word choices suggest that whatever was current has now fallen out of favor or out of use. Other antonyms could include "unfamiliar," "unrecognizable," "unknown," or "unusual," which indicate that something is not well-known or commonly seen. By using these antonyms, we can craft sentences that express ideas like "The technology was current in its time, but now it is obsolete," or "The language he used was archaic and difficult to understand." Through our choice of words, we express nuances in meaning and subtly shift the tone and focus of our writing.