Well, it took a long time to get full potential out of the Navarro engines. As recent experiments have shown, a high-pressure tight steam engine could probably have been possible as early as 1860. We might have seen ships without help mast and sails as early as 1880.
You know that the last sailing ships (that Ålander shipping company in Mariehamn, what was the name) was phased out of big shipping in the early 50s. Of course, they were more or less out after ww1 ended in 1921, but the post-ww2 shortage and poverty and large transport (refugees, returned plundered goods, rebuilding effort) needs made them viable again.
Hell, I can see a few small coastal old-style sailing (cloth and wooden masts!) ships coming in now and then with non-priority shipments (mostly lumber from the archipelagos) from my office here in Stockholm. Of course, they all have Navarro help engines.
Still, steam engines take a lot of fuel. Even if you use high-quality coal, you still need a LOT to cross the Atlantic without the aid of sails. Imagine the size of the luxury liners if they had to store all that coal when crossing!
Perhaps the economy would be far worse if shipping did not have the range given by Navarro engines combined with the low cost of modern light metal wind cathers (I refuse to call those blinds on various contraptions sails!)