They are in factory control tools and in-car automation systems, for example.

Although the latter are starting to use J2ME systems as well.

At least that is my feeling from job posts here in Germany.

The grandparent is a consultant, how many of this niche is hiring consultants? What are his chances of having steady (consulting) work using Qt? Let's be reasonable, he has a better chance learning MFC (not that that's a good idea either).

Given how Germany is following USA footsteps of outsourcing and offshoring everything in Fortune 1000, maybe there are some opportunities.

In Germany's case mind you, not sure about other countries.

Qt has gained some momentum in the EDA industry as well.

Are enterprises using C++? If they are, what UI library are they using to write user interfaces?

True, but since if one has a job working for an enterprise like that makes me want to kill myself in a hurry I consider that a feature, not a bug.

QT will get you into C/C++ programming, which will get you into backends, which will get you into much more pleasurable programming jobs. Yes, likely there'll be limited QT usage once you're there, but ...