I think you're over-selling the parity. Value based classes aren't definable by your own code yet. Records are severely underbaked, unless I missed it there is

I think you're over-selling the parity. Value based classes aren't definable by your own code yet. Records are severely underbaked, unless I missed it there isn't even a copy method yet, and those are essential for working with immutable data. Then there's still a lot of features that Java is sorely lacking like extension methods, named parameters and delegation, even though they have proven themselves in multiple other programming languages by now.