APL made a lot more sense in an era of 110 baud teletypes when brevity of a programming language was vastly more important than it is today.

The human mind is one of the few things whose bandwidth hasn't increased since then. APL still makes sense.

As someone who actually used APL professionally for ten years, I’ll say APL does not make sense today outside of being a valuable academic tool.

A next generation APL might make sense. No, it isn’t J. That’s an abomination. I have written about this on HN in the past.

Apparently many finance institutions are of another opinion, given how many array languages happen to survive on that space.

Additionally these kind of languages are much more ergonomic for GPPGU, and I expect them to eventually get more adoption into that space.

Financial institutions have codebases going back decades. In some cases they are stuck with decisions made long ago. That’s just about the only place you might find APL these days.

Go to a job site and search for APL jobs to get a sense of what reality looks like in the APL world.