Really though, a Dyson’s swarm isn’t that efficient long term. It’s likely better to dismantle large stars and use fusion reactors with heat sinks at close to 2.73 Kelvin as possible.
Would like a referral to science fiction that talks about this.
Also used in many places in Orions Arm: https://www.orionsarm.com/eg-article/47897e8b1947c
Whole star system optimized into a giant computing cluster with projected sun energy output for computing available for next 14 trillion years: https://orionsarm.com/eg-article/49125f5d1c049 (Or 100000 sun output for 140 milion years.)
Himmelsschmiede - a full star system converted to useful heavy elements using a deep well industrial zone (basically an artificial black hole accreation disk): https://www.orionsarm.com/eg-article/46709da5de6be
Yeah, you might occasionally leave one in place for historical reasons, but otherwise they are just too useless not to make use of their mass for something better. Not to mention traffic management headaches given that normal planets usually stubbornly refuse to do any orbit corrections when needed.