It is production ready. It isn't without its quirks (specially Xcode support) but been using it for a while and works fine for production apps. As jefflinwood

It is production ready. It isn't without its quirks (specially Xcode support) but been using it for a while and works fine for production apps. As jefflinwood mentioned, most likely they don't have the developers proficient in Swift and just want to downplay it. For me this is a red flag for the company.