All subcontractors know the rules - no "smart" devices or "wifi enabled" appliances or mechanicals. All lightswitches are plain-old hi-voltage only switches. Thermostats are dumb, unprogrammable, with no memory or scheduling or timing. The locks on the doors use physical keys.
The smartest thing we have are the sonos speakers and we pug those in with ethernet.
Everyone will be pleasantly surprised when they interact with our house. This is what luxury will come to look like as time goes on ...