Zigbee: You can buy vendor independant bridge / antenna and vendor independant automation server (Home Assistant being the most popular). I guess a bridge vend

Zigbee: You can buy vendor independant bridge / antenna and vendor independant automation server (Home Assistant being the most popular). I guess a bridge vendor could pull the rug on the antenna ("your Sonoff zigbee antenna is now only compatible with Sonoff zigbee product")(to be clear: they've never done that), but the format is open enough that there's ton of alternative suppliers and open source bridge (the aforementioned zigbee2mqtt). In any case, I've got a good amount of both Ikea tradfri and Philips Hur bulb and they have never contacted an Ikea or Philips hardware or software of their life.