I’ve been using linux for more than a decade at this point, but in all that time I’ve rarely had a disk drive. The fact that this command exists and is just, one of the core utils included with your distro along with su and kill and mount and more is just… so beautiful. 10 years amore with this OS and I’m still learning things that the elders in the audience are snickering at me for only learning 5 minutes ago while they were popping their disk trays open with a single command back when disk drives were a non optional component.
There is a whole world of obsolete stuff nobody will ever do with a linux system anymore. Terminal servers with lots of serial terminals or modems for a BBS. Making a fax server, IVR, digital answering machine for analog land lines. Using removable optical or magnetic media. Recording broadcast tv. SCSI, Firewire. It is interesting to imagine what from today will be obsolete in a few years.