It still works; old devices that can only use FTP will benefit from it. For example, photocopiers often have FTP upload support for scans - so you can just slap an RPi onto it to convert that to a newer way of exchanging files.

Put it to you this way, pal: 99% of the time I'm doing containers on AWS, and 1% of the time I spend working in a factory with 8-bit Z80 powered machines that need to get files to/from a totally modern network. Little bits of legacy-adapting middleware are critical!