Are Bluetooth-based smart TRVs reliable, or do I need Zigbee/Z-Wave?

Across the home-automation communities we read, the consensus is that Bluetooth TRVs work well when paired with a nearby gateway or BLE proxy, but range and responsiveness can suffer in larger homes with thick walls. Zigbee and Z-Wave TRVs mesh through other devices and tend to be more resilient at scale, while Wi-Fi TRVs avoid the gateway entirely but drain batteries faster.