User blog comment:Touchinos/“Golden Time” Discussion/@comment-1031724-20191125000618/@comment-1031724-20191125085758

They already addressed this. Chuck favored Sam and Dean so he made specific exceptions with Dean, John, and Bobby. Joshua even mentioned this among his interventions while Sam and Dean were in Heaven.

I don't want a dark ending but I doubt Supernatural's the kind of show that gets a light one. Besides, Billie already said what the 1 in the 14,000,605 was, and that certainly wasn't it. Michael was killed but at a cost that gave way to the ultimate antagonist of the series.