It's more a thing of creative people, not boomers. Artist of all trade are retiring and coming back all the time, independent of their age. I would assume that

It's more a thing of creative people, not boomers. Artist of all trade are retiring and coming back all the time, independent of their age. I would assume that they just have a drive to fulfill, which does not get satisfied enough in retirement. And they simply retire when they feel burned, and come back when they have recharged and found new inspiration.