I always laugh at people who refer to "Chip Kelly's offense" as some archaic, immutable thing.

Although Chip is an interesting enigma both as a coach and as a person, he is fundamentally like every other coach: he embraces some principles more strongly than others, builds his team to support some of the underlying concepts, and plans for each game and each season based on his team and the teams he is facing.

The idea that Chip's offense is obsolete presumes that both the offense and the man behind them are incapable of evolving over time. The problem with that reasoning is that Kelly's teams have frequently evolved during his career. That they have sometimes devolved is notable too, but even that is evidence that he is not averse to trying new things. 

The 49ers were terrible when Chip arrived, and unless he gets much better personnel, he will be lucky to make even modest improvements. As last night proved, he will at least make them entertaining.