I don’t know. My washing machine beeps three times in increasing intervals, so it isn’t that intrusive. The display shows me unique error codes that I can look up when someone happens. And I can set the machine to finish in a set amount of hours, so it will start just in time to be done when I’m back. All without WiFi

TL;DR?

Having built commerical drones, it’s mainly two things, obstacles and ground effect.

Women amirite