The new versions of both Spring Framework and Spring Boot come with new baseline requirements. They also have great new features. Let's look into them.
First of all, what are these new baseline requirements? A jump to Java version 17 breaks all ties with the past. This means that since the majority of legacy Java apps are mostly in Java 8 and the newer ones being written at minimum in version 11+, there's going to be some migration pain if you want to consume all the new bells and whistles. While upgrading a Java 8 app to take advantage of the new Spring version might not be realistic, rewriting it or starting a new project from scratch by adopting the new framework is a sensible proposition.