My issue was not the undercompensation: computer science and engineering are luxuriously funded with 100% in comparison to other research fields.

The question always is what you have to do for that 100%. If it’s really fully public funded and your professor does not expect corporate consulting/research projects from you, then consider yourself very lucky and take that chance!

Project work can be very fulfilling along research when you can apply your problem solutions. You must be insanely careful if these topics do not overlap since it drains your time and you would be compensated better with less stress in an industry job.

Though, it sounds very good, in your case :-)

You will learn tons of prictical relevance skills during your PhD. The theory behind is what later on lands you top jobs, after getting hired in the first place.

The real question regarding PhD in Germany is, though, how you are funded and what that means to your every day work. The strufgle gets real when PhDs doing company work or full time lecturing instead of research. Keep an eye out that you are not solely the underpaid overskilled.

Better soo