An unconnected ATM is a local object. A connected ATM is a node. That shift is what makes fleet operations possible, and what makes security architecture non-negotiable.

The operational gain

Telemetry, remote diagnostics, coordinated updates, and a living inventory of the estate. None of that exists without a trustworthy connection.

The corresponding duty

Encrypted communication, device identity, monitoring, and operational control. Connection without those is not modernisation. It is exposure.