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Backward Compatibility with the previous AEM Version is out of scope for the Pattern Detector tool, while doing an AEM upgrade. The Pattern Detector tool is a tool that scans an existing AEM code base and identifies patterns that are incompatible with AEM as a Cloud Service or newer versions of AEM on-premise. The tool does not check for backward compatibility with older versions of AEM, as this is not a requirement for upgrading. References:

This syntax allows the developer to reference a secret variable that is stored in the Cloud Manager UI under Environment Details > Variables. The secret variable name must start with a lowercase letter and can contain alphanumeric characters and underscores.References:

When performing an in-place upgrade to the latest version of AEM, there are several potential disadvantages to consider:

Long and Arduous Process:

The complexity and duration of the upgrade process can be significant, especially if there is a considerable version difference between the old and new AEM instances. This is because the upgrade process must account for all the changes and improvements made over multiple versions, including content structures, APIs, and underlying technologies.

References:AEM Upgrade Best Practices

Complex Developer Setup and Automation:

Upgrading AEM involves setting up and configuring the environment, updating custom code, and ensuring that all integrations work seamlessly. Automating these tasks can be complex and time-consuming, requiring significant developer effort to script and validate the upgrade process.

References:Automating AEM Upgrades

These disadvantages highlight the potential challenges and resource investments needed for an in-place upgrade.