Anywhere/everywhere there's a system that does not need to run on the web. Like say, an ERP system.
Now, I'm sure you think, "but order entry is part of an ERP system and you must be able to take orders on the web!" True, but the front end that receives those orders is usually just that - a front end. The "grunt work" is done by the back-end systems and is most likely not written in a language like C/Java/VB.
These are the systems that rely on middleware and/or messaging services of some kind to get data in/out. There's still a TON of coding to be done on the back end.
Become an expert is some BI system (yes, not truly a "language", but still). Execs are constantly fooled into thinking that buying a BI system will instantly give them magical reporting and analytical powers over their burgeoning "big" data. Except they don't - all the dashboards, automated reports, etc. need to be developed, configured, rolled out and maintained and are invariably uniquely tied to the company in which they are being used.
I've been using Progress 4GL (now given the num-du-jour ABL) for 25 years. It's a niche. As is the eponymous RDBMS, at which I am also an expert. Progress does not own a significant portion of the DB or application market. But where it is used, folks like me are in high demand. The exact opposite of you, I have not programmed in C/C++/Java/VB since early 90's. And I don't miss it.