It's a wrap! is traditionally pronounced at the end of filming, even when it's only an industrial video, as I used to produce back in the fun old days. Back then I worked with creative free spirits, albeit for "The Man" (ie, corporate entities), but paid well and frequently hired. Freelance professionals all, we showed up for our part, did our best, answered to the project manager who answered to the client, for the length of the project, then we disbanded. It was a joyful experience.
Contrast this with wage-slave life where we show up every day of the work week, 7.5 hours per day depending on the company's official (and unofficial) requirements, which is fine and provides regular income and quite often interesting work. But we are underclass in this situation, subject to the whims of management and the winds of office politics. We are reminded variously of our status as underlings. We are children.