When I started I had a good mix of all 3 (WiFi, Zigbee & Z-wave). 5 years layer, everything's slowly been absorbed into Zigbee. WiFi isn't a mesh network, so there's extremities with poor reliability. Z-wave just seemed to suffer from poor device availability, and everything turned out to be more expensive with no real benefit.

Also, one other thing to mention with WiFi and Bluetooth is how it's basically a massive red flag, a stamp of "hey, this device needs our shit app to use."

It's just a shame there's no Zigbee ESP32 equivalent for all my hobby bits.