My background: First SmartThings featured community developer. Lead engineer for Stringify (now defunct iOS/Android home automation app) Currently a principal engineer for a large company working on smart home. that has a lot invested in zigbee :). My $. 02 on the ecosystem Many hubs support both zigbee and zwave. I've had zwave switches in my house for 7 years. Zigbee has definitely had a resurgence lately. CHIP is the most interesting new protocol to enter the race. backed by Google/Amazon/Apple/Zigbee alliance. Regardless, it's not like the switches will stop working. Even if hubs stop becoming available, I have no doubt that open source projects like HomeAssistant will, when paired with a zwave USB dongle, will continue to integrate zwave switches into any other ecosystem for many years to come. That said, I bought a house a year ago and went with Lutron Caseta for switches and am very happy with it. Requires its own bridge, but rock solid and compatible with everything (Google, Alexa, Homekit, SmartThings, etc etc etc). I love the fact that I can put a "pico remote" in a wall gang plate. and stick it to the wall with command strips. Looks identical to an actual wall switch (and it mirrors an actual switch, so you put these in rooms where the actual switch is in an inconvenient location) and no holes in the wall. Pico remote batteries last 10 years.