Helped more than you think
Many of these were given to colleges when they were retired, and there was a livley exchange of hacking tips, distributed as mimeographed newsletters. Many students got their first exposure to embedded computing from these systems.
I/O, IIRC was 5-level TTY input, Servo control output. Many of the early questions were of the form "How do I get human-readable _output_?"
Linux? Um, the Linux kernel is written not in ANSI/ISO C, but in gcc (A dialect, in the sense that Norwegian is a dialect of Swedish, or Bosnian of Serbian) gcc does not believe 24-bit computers exist.
Not to mention that /bin/true (even on an older FC4 system) is larger than this system's total memory, even when dynamically linked, and stripped.