When you sell a house like this... what do you leave behind and what do you take? This has increasingly been on my mind. I've no desire to sell soon, but there's a Nest doorbell that is wired in, so it stays. A Nest thermostat, which I could remove but when I got the boiler I chose to not have the control panel extra with timer as I knew I had Nest. Then the lighting, the motion sensors... should I take the few thous…
A few months ago I sold a house a house with lots of Insteon stuff, and I left almost all of it in place. Partly it was because we sold quickly and I didn't have time, and partly because it was 9+ year old gear anyway. Insteon has the benefit that the keypad scenes and switch-to-switch links work without a hub. I took my hubs (ISY99 and HomeAssistant) which means no automations or timers.
I would have left the ISY99 if the new buyers had asked, but I didn't want to provide tech support of any sort for it. The downside of this type of gear compared to (the orders-of-magnitude more expensive) commercial stuff is you really have to know quite a bit about it to manage it. For the most part there's really not any local trades people you can call for service, and frankly, it's not worth the headache as a seller to even try to explain any of this.
In my new (current) house I'm in the process of installing Zwave switches. I think they're pretty hub-dependent, which is definitely a downside compared to Insteon for resale. I am really not sure what I'll do when I move, but hopefully it will be several years before that's an issue. I am fairly certain though that HomeAssistant (both software and ecosystem) won't be at the point where I could just leave it for the new owners and not cause more trouble for myself than it's worth.