Too Long; Didn't Read
Product market fit has been entrenched in <a href="https://hackernoon.com/tagged/tech" target="_blank">tech</a> lexicon for a few years now. Marc Andreesen has been credited with bringing the term into mainstream lexicon in 2007 (read his original post <a href="http://pmarchive.com/guide_to_startups_part4.html" target="_blank">here</a>).