There’s no moat on robot vacuums, they just had their initial brand recognition. Lots of companies should pay attention…

I love my Roomba, it’s been truly a life-changing invention for me and my go-to mental construct for how robots can improve our lives and how good design can be very simple yet effective. But I probably bought it used on eBay and I continue to buy batteries every 5-10 years for it on eBay when it needs a new one.