If you have a version of the groovy console which supports Java 21, it is likely to work. 

Are you affected by https://github.com/jhy/jsoup/issues/1616 ?

Currently the work started to allow the use of jakarta.servlet instead of javax.servlet, but I guess that it will take some time to get offically supported.

ToughDay is not relevant anymore.

The exact definition should be part of the license contract, and if it's not stated, that you should get the contract owner clarified with Adobe.(I have seen contracts which have different definitions, there is not single standard definition; mostly because customers have different requirements and ...

I assume that with image you refer to "docker images" or other cloud-native technologies which use immutable images to run containers. The images contain the entire immutable part of the AEM instance, starting with the JVM plus the immutable parts of the repository (/apps and /libs). 

There is not much difference between those, it's just that on each level of abstraction you have a way to save stuff (and you don't need to switch the abstraction layer to do it).

The MSM is good if you want to reuse not only structure, but also content. If you want to centrally manage page structures, I would recommend to check out editable templates. What do you mean with "I would like the ability to edit the content in one location"? Because you just said, that the content...

You get this message only if you forgot to close the ResourceResolver; that means that in some area of your code you open it but forgot to close it.

Technically these timestamps should be correct, and this is the first case I read where it is reported as problematic in some cases. The jcr:lastModified property can be updated in a number of cases (maybe even in the case, where nothing was effectivly changed, but the UI did a request to the backen...