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The original was posted on /r/space by /u/Cryovenom on 2025-08-08 21:30:59+00:00.

Forgive me if this is a dumb question.

My understanding is that the International Space Station is modular so that individual modules can be added, removed, and moved around as needed.

If that’s the case, why are there plans to deorbit it? Why aren’t we just adding new modules and removing the oldest modules one at a time until we’ve replaced every module, effectively having a “new” ISS every other decade or so?