What To Check Before Buying A Connected Device For Your Home
The purchase decision includes a support commitment you are rarely told about.

A connected device is a physical product and an ongoing service. The physical product is covered by warranty and consumer law. The service is covered by terms that can change, and can end.
Ask how long it will be supported
The most consequential question is how long the manufacturer commits to providing software and security updates. Some publish a support period; many do not.
A device that stops receiving security updates while still working is a durable good that has become a liability on your network. For anything with a camera or a microphone, this is the primary question, not a secondary one.
Ask what it does without the internet
Establish what the device does if the manufacturer's service is discontinued. A lock that still works as a lock, a thermostat that still runs a schedule locally, a speaker that still plays over a cable — these degrade gracefully.
A device that becomes inert without a server is one whose usable life is a business decision by someone else.
Look for local control
Support for open standards and local control means the device can often be operated by other software after the manufacturer loses interest. It is the single best predictor of a long usable life.
Check the subscription boundary
Establish which features require an ongoing subscription and whether that boundary can move. Features that were included at purchase have, across the industry, later moved behind subscriptions. Terms permitting this are usually right there in the agreement.
Check the data terms before buying
Anything with a camera or microphone deserves the privacy policy read before purchase, not after. Where recordings are stored, how long they are kept, who may access them, and whether they are used for anything beyond delivering the service.
And check the network
Whatever you buy, put it on a guest network separated from your computers and phones. It is a ten-minute change on most routers and it limits what a compromised device can reach.