Modernize old automations

Configuration
1

Hey all, I have a bunch of automations revolving around “People at home, open windows, outside temp, outside air quality”, all of them remember 0.100 releases or so :wink:

binary_sensor:
  - platform: template
    sensors:
      # Returns true only when there is good air outside AND air outside is colder than inside
      should_i_ventilate_home:
        friendly_name: "Should I ventilate home?"
        value_template: >-
          {% if states('sensor.airly_pm2_5')|float > 15 -%}
            False
          {%- else -%}
            {{ states('sensor.air_purifier_salon_temp')|float > states('sensor.airly_temperature')|float }}
          {%- endif %}

# automations
- &window_template
  alias: When back home- Open Window, it's chilly outside
  trigger:
    platform: state
    entity_id: binary_sensor.people_at_home
    from: "off"
    to: "on"
  condition:
    condition: and
    conditions:
      - condition: state
        entity_id: group.all_windows
        state: "off"
      - condition: state
        entity_id: binary_sensor.should_i_ventilate_home
        state: "on"
  action:
    - service: notify.notify_all_mobile_phones
      data:
        title: Otwórz okno
        message: "It's chilly outside, You can open window!"
        data:
          tag: "home-ventillation"

- <<: *window_template
  alias: Close Window, it's hot outside
  trigger:
    platform: state
    entity_id: binary_sensor.should_i_ventilate_home
    from: "on"
    to: "off"
  condition:
    condition: and
    conditions:
      - condition: state
        entity_id: binary_sensor.people_at_home
        state: "on"
      - condition: state
        entity_id: group.all_windows
        state: "on"
  action:
    - service: notify.notify_all_mobile_phones
      data:
        title: Close the window
        message: "It's hot outside"
        data:
          tag: "home-ventillation"

- alias: Close Window, air quality is bad
  trigger:
    platform: numeric_state
    entity_id: sensor.airly_pm2_5
    above: 20
    for:
      minutes: 5
  condition:
    condition: and
    conditions:
      - condition: state
        entity_id: binary_sensor.people_at_home
        state: "on"
      - condition: state
        entity_id: group.all_windows
        state: "on"
  action:
    - service: notify.notify_all_mobile_phones
      data:
        title: Close the window
        message: "Bad air quality outside"
        data:
          tag: "home-ventillation"

- alias: Empty apartament with open windows
  trigger:
    platform: state
    entity_id: binary_sensor.people_at_home
    from: "on"
    to: "off"
  condition:
    condition: and
    conditions:
      - condition: state
        entity_id: group.all_windows
        state: "on"
  action:
    - service: notify.notify_all_mobile_phones
      data:
        title: Close the window
        message: "You left the aparament and left windows open. Is it safe?"
        data:
          tag: "home-ventillation"

I’d like to modernize them and use recent features of Home Assistant (My guesstimate is choose can fit nicely in some of them), what do You suggest to re-implement/refactor this and keep it 2021.6.x style?