When I got into O gauge years ago, I used to frequent a local train store (now gone) that was conveniently located about 20 minutes away. A modest place but fairly well stocked and very friendly owners. On one my visits for more track, or scenery, or whatever I made the comment that, "I am almost finished." The owner laughed and said, "...your layout will never be finished..."
In the spirit of this thread, truer words were never spoken.
