Definitely agree that mainstream languages are adopting functional features, but records aren't a functional feature.
Records are basic data modeling and something that has been around since the beginning of programming languages, whether procedural or functional. It's one of the bare minimums of having a type system, and Java didn't have this due to the misguided belief that "everything is an object". I think records being added is more of a symptom of that belief weakening.
There are functional features that have made it over to Java which are the things related to functions, i.e. lambdas and such which are a welcome addition.
Records are basic data modeling and something that has been around since the beginning of programming languages, whether procedural or functional. It's one of the bare minimums of having a type system, and Java didn't have this due to the misguided belief that "everything is an object". I think records being added is more of a symptom of that belief weakening.
There are functional features that have made it over to Java which are the things related to functions, i.e. lambdas and such which are a welcome addition.