That’s what I’ve always thought. It would never be finished. As the original pieces get old and unable to be maintained, disconnect them and deorbit them as you replace them with new pieces. It just seems to me that dismantling and deorbiting the whole thing after 20 years would be a waste. I seem to recall the Russians had plans to add more modules to MIR as time went by, but history overtook them and they didn’t have the money to complete it. So MIR was really never completed. I hope the same thing doesn’t happen to the ISS. It may be impractical to keep replacing some of the pieces like the Destiny Lab to which the S zero truss and most of the other labs are attached.