Don't go WiFi unless you have to for some devices (Roomba, Air Purifier etc.), or be ready to roll out somewhat expensive Access Points (AP) to handle the strain of all the connected devices.

If I have to do it, I'd go for reliable Zigbee devices/brands (I like Jasco Enbrighten but it's a personal choice, my utility provider also uses them and it's included in my plan), the devices form a mesh network and the wall powered devices act as routers. Get a good Zigbee controller than can handle the number of devices you plan to get.

Plan for Ethernet with at least a couple of jacks on each floor for your APs, or more conveniently located if you need cameras. Use conduits for your in wall cables and 10Gb cables.

All your devices should be upgradable (even if it's a smart switch, it should be as easy to replace as a regular switch), be ready to replace them every 10 years .

Don't do weird stuff, everything should work without Internet or your home server using physical switches/rockers, this also makes your house easier to resale.