>>14125108nig nog, the purpose of a Dyson Sphere was originally assumed to be the kind where the inner surface is a giant shield world for the species in question. The complexity of maintaining homogeneity of the atmosphere at that scale is beyond pale. So shield world type spheres are more than likely impossible. However, Dyson Shells are entirely possible, whose primary purpose is to conduct stellar lifting; extracting zetatons of hydrogen and morphing the complex magnetic fields of the Sun, coupled with the high intensity plasma in the corona, to fuse hydrogen into successive high order elements all the way to iron rapidly for material use; or to bypass all that and just create exatons of metallic hydrogen which can be leveraged anywhere from creation of starship and station hulls, to plugging into fusion reactors directly and burning that as fuel to generate petawatts or even exawatts of energy. If you could occlude just 3-5% of a Star with a Dyson Shell for the purpose of Stellar lifting, that alone would generate ENOUGH mass volume of metallic hydrogen to power your civilization for hundreds to thousands of years.
https://www.nextbigfuture.com/2016/11/metallic-hydrogen-is-metastable-could.htmlMetallic hydrogen could be used to build floating cities on planets like venus or to float on oceans of Earth like worlds. Ship fuel tanks can be ultra thin while being able to tolerate insane pressures that makes Starship pressure metrics look like a joke, Applying it to every facet of your civilization means, you can massively increase the efficiency of damn near everything you make relative to the energy needed to move that mass. Its applications are boundless. Hell, you can via Stellar Lifting, source enough of this material to go and build a 100,000km wide cylindrical slice that's connected to a counter weight slice and they rotate against each other on their barycenter at 1G. 100k-km = 125,663,706,143km livable surface area. Like picrel.
