You probably aren't running 20 year old hardware that hasn't seen a software update since 1991. Some people are. Mostly people where the computer is incidental to the machine.
e.g. Back in the '90s the MRI scanners at my institute used VAX models that were well and truly obsolete even for the day, with tremendously obsolete versions of VMS because that was what was FDA approved and no changes could be made.
One can certainly imagine a device with a 6 figure price tag that communicates by telnet to a user supplied server. (Not our MRI scanners though, we weren't allowed to upgrade their software to support TCPIP.)
e.g. Back in the '90s the MRI scanners at my institute used VAX models that were well and truly obsolete even for the day, with tremendously obsolete versions of VMS because that was what was FDA approved and no changes could be made.
One can certainly imagine a device with a 6 figure price tag that communicates by telnet to a user supplied server. (Not our MRI scanners though, we weren't allowed to upgrade their software to support TCPIP.)