Java the language is decently boring, (although I appreciate how Kotlin has tried to advance while staying pretty boring). But not Java the ecosystem. When I returned to using Spring a couple years back, I thought, "Well, it was rough then, but I'm sure they've worked out a lot of the kinks." Nope. It had become more complicated and less reliable. I know a lot of Java-land stuff seems fine to people who live in enterprise-land, where people have a very high pain tolerance and no particular urgency around getting things done. But for me that's not the right kind of boring.