Like any good foundation, wireframes are the basis for many conversation around design and design decisions. In my work flow, they have allowed me to structure meetings around specific requirements without having to go down rabbit holes of content and color palettes. They get the message across and are easy on the eyes.
In an non-agile environment, they have been a good deliverable for everyone to follow. Over the year though, the need for wireframes as a deliverable has considerably died down. With Sketch, Invision and XD, more and more deliverables are a version of the high fidelities.
Here are some of wireframes, i have worked upon over the years. Depending on the scope of the project, some had detailed annotations going over every action. While others were just simple sketches to get ideas across.