Why are all java apps super slow like Intellij and require you to play around with heap memory with things like xmx min max etc? I write Java code for a living and it's so dependent on frameworks to do many basic things where you can't really reason about the code. Subtle bugs can come from mutability here, nullability there, hidden state in another place and most coding styles rely on these and use them because it is so easy to do. It's possible, but not idiomatic to write immutable stateless code in Java. Coding in Java is now much more pleasant with records, optionals, sealed interfaces and streams, but it's interweaved with old coding styles so that it negates most benefits of the new patterns