IMHO, there's a better answer to any thing you like about FTP. For simple stuff, TFTP seems... fine? I've never looked under the hood, but I'm pretty sure it fixes the really bizarre choices in FTP. For everything else, either SFTP or HTTP seems to be the rule. For moving files around between machines, I've become quite fond of https://github.com/9001/copyparty over http

Isn't the what sftp is? sftp multiplexes commands and data, and is single port without all the old fashioned two port negotiation of FTP.