Goldberg's 173-0 was an unprecedented feat. There is a 99.9% chance that we will never see anything like it again.
We all knew the streak had to end, but most agree that WCW botched it. Kevin Nash doing it was unsatisfying.
How should it have ended?
I would have had Booker T end it. He used to get huge reactions each week, and a win over Goldberg would have solidified him as a major name.
WCW saw the value of a Booker T win over Goldberg. They gave Booker a clean win during one of their matches (the only match where Goldberg lost clean).