Everything involving a user is a real time thing. But that's now how the software industry views it, somewhere along the line the user became a peripheral rather than the other way around.
Re:A Personal History of APL (1982)
by 082349872349872 on Sunday December 03, 2023 @03:26PM
(#38510433)
"Every system is fault-tolerant; unfortunately in most of them the component tolerating the faults is the end user."
For the APL family, that's often a call for code which works with external interfaces. In many potential APL environments a handful of well designed custom primitives would get you where you need to go.
But no programming language is adequate for all roles, and that includes APL. (It can still be useful for modeling / prototyping for real time work, but that's not always necessary.)