There is enough choice of MQTT-compatible devices, running Tasmota or other (for example Shelly devices). No vendor lock, open protocol, no single point of fail

There is enough choice of MQTT-compatible devices, running Tasmota or other (for example Shelly devices). No vendor lock, open protocol, no single point of failure (well, usually people only setup one MQTT broker, but it is possible to publish-subscribe to several brokers at once).