alt Hacker News(Not the OP, but want to spread awareness, sorry.) The Wikipedia page already lists the greatest disadvantage:
> (..) the ability to commission a finished product into a Matter network in the field mandates certification and membership fees, entailing both one-time, recurring, and per-product costs. This is enforced using a public key infrastructure (PKI) and so-called device attestation certificates.
Matter is designed to necessitate phoning into the internet for certification, which allows all manufacturers to just easily add-in phoning into the internet for telemetry. Furthermore, it does not define exactly which functionality must remain if a device is disconnected from the internet for a long time (assuming the user is trying to avoid sending out telemetry, not even bypassing certification).
The Matter devices (a smart bulb or a sensor) have no Internet access required by the spec, and no way to send telemetry to the Internet.
It’s the commissioners that check for the certification: your phone or an open source implementation.
And the commissioners can, explicitly by the specification, commission other devices while completely offline.