Who will buy the phones when no one is paid to produce them? The cars? The food and the clothes? Wealth keeps concentrating upward, great leaps in efficiency and throughput, but I can't see how it's a sustainable model for continued consumption growth year after year.
Imagine a near term scenario where a humanoid domestic robot that can do the dishes and laundry goes on sale for about the price of a luxury car. boomers who want to stay out of the retirement home for as long as possible will snap that up. Now imagine it's been a few years and one of these robots that used to go for the price of a nice car is outdated and can be bought for a couple grand and with a couple grand for…
Wouldn't these self-replicators also be bottlenecked by materials and other infrastructure? Does each one have a semiconductor fab, mining equipment, metal foundry, etc, built-in? I also don't see how you get from a laundry robot to a self-replicator through garage tinkering, those seem very far apart.