Better integration with k8s, mainly through more opinionated libraries (you're less likely to accidentally choose heavyweight thing which tend your service towards monolith), faster startup & faster reloads during development.

https://github.com/spring-projects/spring-framework/issues/2... is an open issue for Spring; the moral equivalent is closed for Quarkus. If you have DI misconfiguration, you tend to get it at build time rather than runtime.