Lazy jacks are also cheaper, and can be easily applied after-market. However, they are not without disadvantages. The extra lines provide something else for the sail to foul upon when it is being raised, particularly if it is battened, and the lines and the connections between them can chafe and beat upon the sail, shortening its life and making unwanted noise.
Lazy jacks are not only more economical but can also be retrofitted. However, they come with certain disadvantages. The extra lines create another point of tangling for the sail when raised, particularly if battened, and these lines and their connections may rub against and wear down the sail, shortening its life and causing unnecessary noise.