Just because they're not supporting it doesn't mean you don't own it. As you said, the CE that designed it doesn't need to maintain it, and your license for th

Just because they're not supporting it doesn't mean you don't own it. As you said, the CE that designed it doesn't need to maintain it, and your license for the design of the building limits your ability to modify the building. My point was that most buildings aren't kept around forever either, as you were implying.