Plus the entire station getting past its design lifespan. And while the ISS was able to apply a lot of lessons from Skylab and Mir on things like mold growth, I imagine the ISS has accumulated its share of problems too and provided a lot of lessons for future station designs.
As an asset it's only logical to replace it. It's only contentious because of the sentimental value attached to the station.
As an asset it's only logical to replace it. It's only contentious because of the sentimental value attached to the station.