If disagreement about strategy was the cause for Intel’s decline you’d have to ask yourself just how effective the board of the company is/was.

There’s also very little evidence that whatever Tan’s strategy may have been was any better. Just evidence that they clashed about strategy. It doesn’t mean his would have done any better at all.

His own strategy could have turned out the same or worse just as much as it could have turned out better, since we have no knowledge of what his actual strategy was.