Automatic litter box is a great example. We've had one for ~7 years and it's still going strong. High initial cost that pays back every day over the course of what will likely be a decade+ of usage. Absolutely worth every penny if you look to the horizon. I imagine the robot mowers and robot house maids will fall under the same type of payback but with even higher upfront costs - perhaps this will turn into yet another subscription scheme.

> We've had one for ~7 years and it's still going strong

Interested. Which one?