[synergy20]

that's new to me, did not track this field for a few years. zigbee protocol was too complex in the past for me on resource restricted devices, while zwave is so much light-weight, then that's just the technical side. maybe that's why z-wave now opens up, it's forced to do so or it dies.

[Semaphor]

Zigbee was bigger in Europe, Z-Wave in the US. Or at least that was what I always read ;)

Philips Hue was always the big "Zigbee? Never heard of that" Zigbee producer, nowadays, there are also good and cost-effective things from Sonoff and Aqara, and cheap but hit-or-miss devices by tuya (heavily white labeled)