Java: Removes JAXB from the base language, moves it into Jakarta EE, now XML deserialization into objects is an external depencency .NET: System.Xml.Serialization.XmlSerializer has been there since .NET Framework 1.1 witih no signs of going away anytime soon
Yeah, I'm rewriting this thing in C# instead of hanging on to Java. You win, Microsoft.
There are serialization libraries for object persistence and you can use #FFI to other language runtimes like #CLR or #JVM (if you don't feel like just using #ABCL directly).