Service industry jobs and electricians and toilet unclogers and windshield replacers and new tire stores and automotive mechanics will always be needed.
Or go back to a barter economy because large swathes of the population won’t be able to buy the crap they’re making. There’s liable to be multiple economies caused by this. Economies for those who can afford the crap, and economies for those who can’t. Maybe that’s always been around (like yard sales), but I could see it expanding. Then govt will really have a hissy fit, and will want more control over us because a lot of activity will be hard to tax. I think a lot of the wealth these machines produce will be out of reach of a lot more people, and demand will drop, unless prices go to the basement. It’s hard to predict what will happen. I wonder if their machines will be as innovative as people can be.