Any thoughts on best smart light switches / hub for a shomer Shabos home?
I think that most of the answers to this question are subjective. I have personally been using Z-Wave switches for about 15 years and Wink as my hub for about 5 years, with minimal issues. (i.e. I can only think of 1-2 times in the last decade or so where something happened that my lights didn't turn on/off a scheduled on Shabbos or Yom Tov). I chose Z-Wave initially in the early 2000s (moving there from X-10 switches, which always had issues) because it was one of the first Mesh-based wireless systems that allowed you to control all of your lights with one controller. As smartphones and app-based home automation became more mainstream I upgraded to Wink, because I didn't want to completely replace my switches.
That being said, I think if I had to do it again from scratch, I'd probably chose Zigbee switches (which are slightly cheaper) and then use an Amazon Echo Plus for the hub. Yes - I know you can't use Alexa on Shabbos, but the Alexa plus has a built-in Zigbee hub that can control your devices, and while the scheduling UI might be a little Wonky, you really only need to change it around Yomim Tovim. I'd also prefer having one less device to plug in around the house.