What are the disadvantages of using Swift for iPhone app development?

The disadvantages of using Swift for iPhone app development include limited backward compatibility, smaller community support compared to older languages, and frequent updates. Swift applications often face problems where they have to connect with legacy systems or projects written in Objective-C and require extra bridging. This might lead to the most discussed drawbacks of Swift: the frequent changes in the language create some learning problems for developers and may give a headache with compatibility for different versions of code. Although it is really growing, the community of Swift is still relatively small compared to more established languages, which means fewer third-party libraries and resources. Swift is Apple-platform-exclusive, which at once limits its use for cross-platform development in comparison with other tools.