If you want IOT things that are fully under your control, it's definitely possible. Home Assistant with Tasmota/Zwave/Zigbee devices is very powerful, all without requiring any cloud connection.
I have so many minor automations that add up over time. When I get home, my Z-Wave lock on the front door automatically unlocks. If I open the garage, the LED shop lights turn on and the door in from the garage unlocks.