I started with a similar path a few years ago - IKEA smart home gear. The controller went away fairly quickly. I stayed for a long time on raspberry pi + Zigbee

I started with a similar path a few years ago - IKEA smart home gear. The controller went away fairly quickly. I stayed for a long time on raspberry pi + Zigbee stick from DeConz + Apple home integration using homebridge.io. Deconz felt a bit bloated/buggy, so I switched to using a cheap USB stick from aliexpress, and using zigbee2mqtt, which turned out to be a pretty good combination. Unfortunately Apple decided (while I was on a business trip) that Apple TV 3 was no longer good enough as a home hub, so all of my soft switches stopped working... As a result in a couple of days I wrote a quick MVP replacement in Rust, which has been working very nice for me, and the "user" (significant other) feedback was that it is now much more reliable and responsive. Putting it here in case anyone finds it useful. https://github.com/ayourtch/homegui https://github.com/ayourtch/homegui