A modern programming language that makes developers happier.

kotlinlang

That's true, and I have refined my comment accordingly. This proposal only focus on the part that is not incompatible with Spring Boot core principles like auto-configuration. Spring Fu was IMO too far away from Spring Boot, we have to find a better tradeoff between explicit configuration and auto-configuration. But this improvement could allow later a more explicit configuration model for Spring Boot if the Boot team and community want to support that.