My own aircons are just simple individual items that are interchangeable between rooms.
There is no single control for the whole house but on the other hand I never let it run when I am away and I am never in 2 rooms at the same time so I just close the door so I only have to keep one room cool. I fail to see the need of an aircon I could control remotely with a smartphone or any smart bullshit system that control every room at the same time. And I think if I ever needed that I would probably just control the individual aircon via small esp32 with irtransmitter driven by a home server. That way the individual remotes would still be usable in case of an individual failure.
I have two separate aircons in our apartment. They both plugin to the wifi and I can control them locally from my home assistant instance. When hass detects nobody is at home, it will just automatically turn off both aircons with all the lights.
It is also handy if it is extremely hot like now and we're both out to monitor if it gets over 30 inside, so we can remotely get it cooler so the plants, cats or server will not suffer too much.
There is no single control for the whole house but on the other hand I never let it run when I am away and I am never in 2 rooms at the same time so I just close the door so I only have to keep one room cool. I fail to see the need of an aircon I could control remotely with a smartphone or any smart bullshit system that control every room at the same time. And I think if I ever needed that I would probably just control the individual aircon via small esp32 with irtransmitter driven by a home server. That way the individual remotes would still be usable in case of an individual failure.