When I tell people about my scythes, they often comment that "Yes, scythes are a useful tool, but you can't mow a whole field with one." Well they used to; and in some parts of the world, they still do! It's a matter of scale, number of scythers, and time. Here's a series of 4 videos on YouTube, from Serbia, posted by misicgricko5, where they are mowing a rather large field as a group.
I am often told, "but you can't mow a whole field with a scythe." Well, people used to, and still do in some parts of the world. I'm the only scyther here on my farm, so I just mow small sections at a time. But I am always amazed at how much grass gets cut in a day, when I teach a scythe workshop, with 6-12 mowers. When they all go home at the end of a workshop, and I have to tedd and process all the hay that they cut, all by myself, it can be quite overwhelming. Here is a lovely little documentary showing how large fields can be mowed by hand.