I mean Yeah it is an afterthought in the Sense of that Java was Originally an oop Language but fp in Java was added on very sensibly imo. I use functional Programming in Java a Lot and try to make Everything immutable where I can and honestly coding like that feels clean and very practical.
Im biased but Java is a better language and learning go is good to broaden your horizon but will you Need it? Probably not much, mostly when working with helm i assume..
Tfym „Most“ 🤨