https://github.com/spring-projects/spring-framework/wiki/What's-New-in-the-Spring-Framework

7.x
https://spring.io/blog/2025/09/02/road_to_ga_introduction
https://loiane.com/2025/08/spring-boot-4-spring-framework-7-key-features/
https://medium.com/@csmax/preparing-for-spring-boot-4-and-spring-framework-7-whats-new-263829429064
https://github.com/spring-projects/spring-framework/wiki/Spring-Framework-7.0-Release-Notes
6.x
SpringDeveloper - Long - Spring Tips: the road to Spring Boot 3: Spring Framework 6 of 28:36
    https://www.youtube.com/watch?v=aUm5WZjh8RA
    ! 7:00  ProblemDetails
    ! 12:00 MicrometerObservationRegistry
    ! 20:00 WebClient and decl-ve i-faces
https://github.com/spring-projects/spring-framework/wiki/What's-New-in-Spring-Framework-6.x
    https://github.com/spring-projects/spring-framework/wiki/Spring-Framework-6.2-Release-Notes
        https://spring.io/blog/2024/10/01/from-spring-framework-6-2-to-7-0
    https://github.com/spring-projects/spring-framework/wiki/Spring-Framework-6.1-Release-Notes
https://vladmihalcea.com/spring-6-migration/
https://github.com/spring-projects/spring-framework/wiki/What's-New-in-Spring-Framework-6.x
    https://spring.io/blog/2022/11/16/spring-framework-6-0-goes-ga
Devoxx - Introducing Spring Framework 6 0 by Brian Clozel and Stephane Nicoll 0:00 of 46:29
    https://www.youtube.com/watch?v=5FWNpaiqYhw
https://www.infoq.com/news/2021/09/spring-6-spring-boot-3-overhaul/
5.x
https://spring.io/blog/2020/09/15/spring-framework-5-3-goes-rc1
https://www.infoq.com/presentations/spring-framework-5-2/
https://www.infoq.com/news/2018/09/spring-51-java-11
https://spring.io/blog/2018/09/21/spring-framework-5-1-goes-ga
https://spring.io/blog/2018/07/26/spring-framework-5-1-goes-rc1
https://github.com/spring-projects/spring-framework/wiki/Migrating-to-Spring-Framework-5.x
https://github.com/spring-projects/spring-framework/wiki/Spring-Framework-5-FAQ
https://www.ibm.com/developerworks/library/j-whats-new-in-spring-framework-5-theedom/index.html
Hoeller - Spring Framework 5: Themes & Trends 
https://www.youtube.com/watch?v=ETFe3KiYwt8