Board Thread:Game Discussion/@comment-35553674-20180618093145/@comment-29898480-20180618174822

For the cars I really like, it's nice to know I have them as good as they can be, and it gives a satisfying sense of completion. Those are intangibles, but for me they're a real part of the enjoyment of the game. I don't have the Nismo on my short list of favorites, but if it's on yours, that's a reason to spend the gold.

As others have said, there's no 'tangible' reason to spend the GC on that upgrade.