Actually, my experience is that APL in the wild (as practiced by those who are just trying to do their job) is not very terse at all. It looks like an old-school procedural language. Since APL is an incredibly proprietary community, it can be a bit hard to find public examples of "industrial" APL style, but this looks similar to what I remember is written at places like SimCorp: https://github.com/Dyalog19/SA3/blob/953e591eace72bb1c147d19...