A home automation (HA) system may include a cloud server, HA operation devices within a senior living facility, and HA user interface devices for respective users within the senior living facility. Each HA user interface device may include a user input device, a display defining a user interface (UI), and a controller. The HA system may include HA hub devices within the senior living facility to provide communications for the cloud server, the HA user interface devices, and the HA operation devices. The controller may send user interaction data to the cloud server and operate the UI according to a user cognitive level. The cloud server may be configured to determine the user cognitive level based upon the user interaction data received from a given HA user interface device, and send the user cognitive level to the given HA user interface device.