https://www.techradar.com/news/best-cordless-vacuum-cleaner >In the beginning was the vacuum cleaner, and lo, t'was wired and heavy. And then the cleaning gods cast out the wires, and the bags, and all the heavy bits. And lo' we were left with the best cordless vacuum cleaners, and it was good. >Which is a flowery way of saying that, after years of being just 'OK', cordless vacuum cleaners are now very good indeed.