Any drawbacks to using WiFi light switches instead of zigbee/z-wave?

[sidjohn1]

Depends on your setup:

Z-Wave vs Wifi

The following FAQ, particularly post five, should answer some of your questions (this is a clickable link). The FAQ IS old but still accurate. To answer your specific questions, Wi-Fi devices typically use 4 to 10 times as much energy as zigbee, and about 5 to 8 times as much as Zwave. But it depends on the specific models, some manufacturers worry a lot more about power efficiency than others. With regard to repeaters, there are two answers to that. First of all the whole point is that mesh devices repeat for each other. If you have a Z wave light switch in the living room and a zwave light switch in the kitchen, they can repeat for each other. You don’t have to buy special repeating devices. Most people will not have to buy extra Devices just to repeat. See the following FAQ, sta…

2019: Is WiFi the new IOT Standard? (CEpro Article)

First, the over-the-air power: Tesla (the man, not the company) would be proud. Second, the wireless power transmitters obviously won’t be cheap. Third, all new WiFi devices. Window sensors, door sensors, motion sensors… Fourth, an infrastructure not designed for this. Again, all new devices. Fifth, battery backup for wireless power transmitters! Else a power outage kills it all. As the article points out - all to avoid the hassle of a $50-100 zigbee/zwave hub?