I’ve not heard that term (“mid-life crisis”) in the context of describing dance choreography. I like it, but that carries no weight other than a personal “inside joke” unless it has more widespread usage. But if it starts catching on, I’ll see about joining that bandwagon.
On a completely different subject, I’ve recently heard term “mid-life crisis” used to describe dance that progress in the middle like this one. Has anyone else come across the term?