Everybody needs a boomer or two.
Excellent retaliatory strike weapon, too expensive and complex and unnecessarily stealthy for first strikes, so they are not likely to provoke a war but great for discouraging one. There's no way to prove it, of course, but I believe the missile boat kept the peace through most of the last half the twentieth century. Every penny we and the Russians spent on them was well spent.
BTW, do the Russkies still make their boat hulls out of Titanium? For a time there, they were the only ones who knew how to weld Ti on an industrial scale.