No, Shopify cannot modify third-party apps.

The app developer.

Yes, they may fail or conflict with newer Shopify updates.

Sometimes, but Shopify may display warnings.

Yes, developers receive advance warnings.

The app may become unsupported or stop functioning properly.

Typically for one year.

New API versions are released every three months.

Because Shopify APIs evolve regularly and developers must update apps.

Apps that no longer work properly because developers failed to update them.