The question isn't about how many users, as long as there are some.
It's more about the relative operational cost of setting up and maintaining https://www.ietf.org/ietf-ftp/ rather than just keeping ftp going another 10 years.
The idea of rewriting "ftp:" URLs to be "http:" URLs doesn't help people with scripts that were written before URLs were invented.
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https://LarryMasinter.net @ https://Interlisp.org <= (40 year old software with parts expecting PUP and XNS)
