For example, suppose you wish to back up switch configs or dump a file or whatever and tftp is so easy and simple to setup. You'll tear it down later or firewall it or whatever.
So a quick search "linux tftp serevr" gets you to say: https://thelinuxcode.com/install_tftp_server_ubuntu/
All good until you try to use the --create flag which should allow you to upload to the server. That flag is not valid for tftp-hpa, it is valid on tftpd (another tftp daemon)
That's a hallucination. Hallucinations are fucking annoying and increasingly prevalent. In Windows land the humans hallucinate - C:\ SFC /SCANNOW does not fix anything except for something really madly self imposed.