The ISS is modular. There's no need for a "new" ISS, per se. You just attach new modules and, if need be, detach and deorbit old modules. It's less exciting,

The ISS is modular. There's no need for a "new" ISS, per se. You just attach new modules and, if need be, detach and deorbit old modules. It's less exciting, kind of like maintaining an old code base.