One thing that struck me in the immediate aftermath of the Rams game was that in recent history, it has been the Fins who played the role that the Rams played on Sunday. In recent history, it has been the Fins who collapse late in games, can't hold onto leads, find some way throw away what should be a win. It was refreshing to see the team find a way to win in the 4th quarter instead of finding a way to lose in the 4th quarter.
That was why this game was so big, and why Tannehill's spearheading that sort of effort was so important. The most competitive teams in the league have QBs who can do that, and they routinely (not always) pull those games out in the end if need be.
Also, unlike the previous four games, this win involved no such advantage in turnover margin, and so "luck" explanations were off the table.