As fascinating as I find it, #uucp (and the modernized version #nncp) has limited actual use nowadays. For one, most machines nowadays are connected to the internet constantly, eschewing the need for delayed commands and file requests.
And it's not like many people still have dial-up modems around, or even the infrastructure to use them.
(who even has a landline still? and there seems to be an issue running modem signals over glass fiber as well)