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Things couldn't have looked much worse for Honda heading into 2018 after a disastrous three years with McLaren, but success with Toro Rosso proves there is much to be optimistic about in the future.
Formula 1 changes very quickly, and a year is a very long time. Surely, though, not long enough for anyone to have ever believed 12 months ago that, at the end of the 2018 season, Honda would be viewed as a potential deciding factor in the '19 world championship.
This year has been vital for Honda, which could have walked away from grand prix racing, tail between its legs, after three dismal seasons with McLaren. Instead it looked to Toro Rosso for redemption, in the hope that it could convince the team's parent operation Red Bull it was worth backing longer-term.
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