Vote: Are Ferrari right to retain Raikkonen?

Ferrari have retained Kimi Raikkonen for the 2018 season, but have they made the right decision?
Raikkonen has been vastly overshadowed by team-mate and World Championship leader Sebastian Vettel this season, but this is now the third year in a row that the Finn has agreed to a 12-month contract extension.
Are Ferrari right to keep a trusted, experienced driver on board or should they have brought in a new driver in his place for the 2018 season?