’Twas ever thus, the fact that robot vacuum cleaners only do a half-arsed, slap-dash job of cleaning your home.
And until the robots have legs to balance on and long arms to reach out with, it will ever be thus, too. They’re always going to need help from a vacuum cleaner-wielding human to finish the job, cleaning under that low couch or in any sort of nook or cranny where the robot can’t or won’t go.