https://champsorchumps.us/records/best-nfl-regular-season-records#tab-most-wins
The winner of Sunday's Lions-Vikings game will become the 9th team to win at least 15 games in an NFL regular season. Of course 7 of the other 8 had to do it with just 16 games.
14 win seasons are less rare but still special. I count 20 current franchises (and the extinct Frankford Yellow Jackets who are linked to but separate from the Philadelphia Eagles) with at least one 14-win season, which would mean 12 current NFL franchises have never had a team win 14 or more games in a regular season. The 14+ winners, which has been done 36 times, are New England (5x), San Francisco (4), Kansas City (3), Chicago (2), Minnesota (2), Pittsburgh (2), Miami (2), Indianapolis (2), Washington (2) and the following with one each: Carolina, Green Bay, Frankford, Atlanta, Baltimore, Denver, Detroit, Jacksonville, New York Giants, San Diego Chargers, St. Louis Rams and Philadelphia.
I spot a couple of times where a 14-2 team was not the conference's #1 seed (Atlanta 1998, New England 2004) but both at least won their division and both ended up getting to the Super Bowl.