[Eridrus]

Every smart bulb I've seen has a fallback where toggling the light switch turns it on, even if the software state was off.

3rd party services going away is a legitimate concern, but that's true of basically every piece of technology these days.

[gh02t]

People seem to miss that Hue and Tradfri both have local APIs too (http and CoAP based), they work without an Internet connection. The bulbs themselves are ZHA compatible as well, you can pair them with your own controllers instead of the gateway.