Home Assistant keeps an optional integration’s startup failure from stopping other connections that do not need it. A broken Shelly or ESPHome setup could previously prevent Bluetooth adapter discovery, taking roughly sixty Bluetooth integrations and HomeKit Controller down with it.
The correction also separates failures such as Spotify or Plex from Sonos and Cast startup. Home Assistant still waits for the relevant setup attempts to finish and reports their errors; a genuinely required connection must still start successfully.