> It's $CURRENTYEAR and Java still doesn't support structs, and it's not clear they actually understand the problem (since e.g. they force everything to be `fin

> It's $CURRENTYEAR and Java still doesn't support structs, and it's not clear they actually understand the problem (since e.g. they force everything to be `final`) I think they do. The problem they are solving is removing indirection and flattening the memory representation of data. Making all the fields final opens up the JVM to some really neat optimizations you can't get with mutable fields. By the time you get something with enough fields in it that the immutability limitation becomes problematic, you likely would benefit from just having a regular class. Structs won't always be strictly faster than regular classes.