State is simple but context matters
An open door can mean arrival, ventilation or an ordinary household activity.
Use delay and conditions when helpful
Immediate notifications for every event can become noisy.
Do not treat a consumer sensor as a complete security system
Life-safety and monitored-security requirements are separate.
Battery maintenance is part of reliability
A dead sensor silently weakens the automation that depends on it.
Keep in mind. Compatibility is not permanent. Confirm the current manufacturer, platform and certification information before purchasing, resetting or migrating a device.