I am able to see the entities folder under /contentEntities are the content you are exposing, and can be either an Asset Model or Page Model (additional models can be created). The space you created above is a container for entitiesEntities represent content that is exposed through the web service e...

Can you share the STR ? what did you do exactly ?

Create a replica of existing AEM6.1 and do an inplace upgrade to 6.3. This way you should have both available. AEM6.1 existing instance and AEM6.1(replica) inplace upgrade to AEM6.3

you may need to update the code. Refer to http://blogs.adobe.com/experiencedelivers/experience-management/using-osgi-annotations-aem6-2/

You may write an osgi service/servlet to find all the pages with a specific template and archive. or you can achieve the same using groovy scripthttps://hashimkhan.in/aem-adobecq5-code-templates/groovy-script/

let me try and reproduce

is the delete option greyed out or you dont see it at all ? please share logs when u navigate to siteadmin and select page

what version of AEM are you using, let me try to reproduce it.

Refer to  https://forums.adobe.com/thread/2393910

have you had a look at this example ?aem-osgi-annotation-demo/SampleFelixServiceImpl.java at master · nateyolles/aem-osgi-annotation-demo · GitHub Refer to Official OSGi Declarative Services Annotations in AEM - Adobe Experience Manager | AEM/CQ | Apache Sling