Said someone once, I think. Then niners are better with mccafrey, yes - but unbeatable? After 6 games and a .500 record? Based on what? One guy is going to clear up every shortcoming they have? Don't forget they have an inconsistent, injury prone QB. Neither he nor McCafrey make a habit of playing 16 games. Also, you might want to check out what the Eagles look like. They have the looks of the best team in the NFC - good on both sides of the ball. The Vikings and Giants are also playing winning football. You think Rogers and Brady are done for sure? I think we've seen their obituaries written for several years now. Even the Cowboys (yuck) are capable of beating anyone. Their defense is very good as well. And of course, there's a team here in LA that's struggling right now, but can't be ruled out. Actually 2 teams.
And let's say the 9'ers make it to the playoffs - they could be one and done in the divisional round, or wildcard round. It happens.
Put down the crystal ball of despair and let the season play out. As Chris Berman is fond of saying - 'that's why they play the games'