Comment by hibikir

Getting it all to work nicely with easy syntax without breaking backwards compatibility at all is not easy. It's the same reason Option types don't take off in Java, as the effort to make them work in an environment with no features for null safety is going to break things.

It's a very conservative language that wants to minimize breakage, and the tradeoff is not without costs. I would argue than in LLM-world, the right tradeoffs change, but I don't think a language like Java is going to assume everyone has an LLM to do migrations for free any time soon.