The kids really have no idea how tenuous computing in general was back in the olden days. Some of the stability issues in the 20th century translated to modern systems would be akin to black smoke coming out of your computer if you happened to have the wrong two programs running at the same time.

I am no kid but screen(1) dates back to 1987 and any wise sysadmin would put that advice on every ~/.login or /etc/motd so the user could run 'screen' at login, some keybinding to detach screen(1) and 'screen -r' on coming back by telnet.

I never used screen back in the day (I was primarily a VMS guy then), but that man page is one of the best-written man pages I’ve come across: informative, friendly and just the right level of detail.