Overlooked is how they became so ubiquitous: JavaBeans. It was well-meant, but it's left a lot of unintended pain in its wake (I'm looking at you, JPA construct

Overlooked is how they became so ubiquitous: JavaBeans. It was well-meant, but it's left a lot of unintended pain in its wake (I'm looking at you, JPA constructors). Without that standard, Java code might feel quite differently today. While you can avoid making it worse with idioms like only using constructor injection, you can't unwrite the billions of lines written to date. Kotlin makes a great effort to atone for the sins of the past.