The article mentions that the inflatable Goodyear torus has become much more realistic since the inflatable BEAM module (2016) on the ISS. That one has a volume

The article mentions that the inflatable Goodyear torus has become much more realistic since the inflatable BEAM module (2016) on the ISS. That one has a volume of 16m^3. But since then, Sierra Space has been working on much larger inflatable modules. Their latest test volume was already 285 m^3: https://www.theverge.com/2024/7/25/24206219/nasa-sierra-space-inflatable-fabric-space-station-burst-test-video https://www.theverge.com/2024/7/25/24206219/nasa-sierra-spac... According to the report, Sierra wants to move to testing a 500 cubic meter volume this year. And the roadmap on their website lists two further habitats with volumes of 1400 and 5000 cubic meters: https://www.sierraspace.com/commercial-space-stations/life-space-habitat/ https://www.sierraspace.com/commercial-space-stations/life-s... That would already be pretty close to the 6000 m^3 von Braun wheel mentioned in the original article. Though Sierra doesn't seem to plan for creating something like the flexible Goodyear torus which could rotate, just pill-shaped inflatable capsules. Not sure whether this has technical reasons.