Zigbee is also pretty cool, between these and an odd Wi-Fi only device here and there, it seems more than adequate.
The protocol is also excellent for battery powered devices in terms of super low power consumption: depending on the device's needs, the protocol allows for the device radio to be completely off for hours at a time. For example, I have a couple of key fob controllers that we use daily but we haven't replaced the batteries in them for years.
My only fear is that "consumerist" IoT platforms that change every few years will usurp it and new Z-Wave devices will become unavailable.
I hit a problem where it was really difficult to debug setup / configuration problems.
I suspect this was due to zwave devices being as cheap as possible: my devices had just 1-2 buttons and 1-2 blinky lights for configuration.
I would have gladly spent $30 more per device to get better device diagnostics.
The Z-wave devices turned out to be significantly more unreliable surprisingly.
The only z-wave device I still have running is my smart lock. Everything else has been replaced with zigbee.
All wired Z-Wave devices also act as repeaters to extend the network, which is handy.
It really just seems to come down to your local market. Zigbee seemed to have more compatible devices in the US vs zwave so I went with zigbee. I only have about fifteen devices, mixed between a few manufacturers, but it's been rock solid after I switched from my initial conbee to a sonoff dongle.
Also important: not overdoing it. I don’t have tons of time to tinker with devices, HA, etc.