The way it used to work in 1.7 was that you would have to choose between different focuses for each habitat. My main decision was between mining habitats and research habitats, if I made a research habitat then it meant I wouldn't be making more minerals, which was a fine trade because I could just build more ringworlds with mining buildings (I don't have a problem with no Mining Districts on Ring Worlds). However now Research districts have a mineral COST to build, which means after you build just a couple of habitats you will rapidly deteriorate your mineral growth. In 1.7 the fact you could have mining buildings on a habitat that you constructed with your own minerals was explained with the building description saying you were mining the asteroids around the planet and the planet below.
Please let us have this again, habitats are much less valuable now.
Please let us have this again, habitats are much less valuable now.