Also, the protocol is pretty much a holdover from the earliest days, before encryption, or complicated NATs. I remember using it with just telnet a few times. It's pretty cool, but absolutely nobody should be using FTP these days. I remember saying this back in the 2005, and here we are 20 years later, someone still lamenting dropping FTP support from a browser? I think we're decades overdue.
The problem wasn't that FTP got deprecated, but that we never got a proper successor. With FTP you could browse a directory tree like it was a real file system. With HTTP you can't, it has no concept of a directory. rsync is the closest thing to a real successor, but no Web browser support that either.
I worked for a company where I had to make screenshots every minute and upload them via FTP for review to get paid. If there was multiple screenshots with the same thing on the screen, there would be questions.
I'm not lamenting it being removed.. but will say that it was probably a huge multiple more popular and widely used than XSLT is in the browser.