Understanding Scenes/Groups and how to define in AC

Scenes used to be defined with each device included in the scene showed up on the screen page with their various Insteon setting like On-Level, Ramp Rate, etc.

With one of the major releases (V5?), the concept of Groups was introduced that gave much greater capability including mixing device technology types. I have been using it and have been fine but realized while researching another problem that, I had survived as opposed to fully understanding how to manipulate eISY to define them to fullest potential with the on-screen hierarchy.

Defining a scene or group means creating the scene and then adding devices as:

•  Controllers
• Responders

Selecting the Scene/Group in the AC left side of screen tree defines how the scene will be executed if a scene command is sent from AC, program, UDM, or REST command

• While the Scene/Group is still selected on left side of screen tree, you can select individual devices under the right side of screen Managed Scene definition. Whatever capabilities the selected device has will be shown at the bottom of the right side of screen. For example, in Insteon:
  •  Responders might have On Level and Ramp rate
  • Controllers show info related to controlling via managed scene?

Selecting a device included in a scene in the AC left side of screen tree defines either how the scene will be executed by a specific controller or what appears to be just the devices definition (same shown if you just selected the device in the left side of screen tree) if responder only. I am guessing this is where the term Group started showing up.

• Controllers selected on left side screen tree displays the devices in the group on right side of screen which you can then select
  • Responders show the device settings at the bottom of right side of the screen that will be utilized on that device if the scene is executed by the controller device selected on left side of screen tree. This means that a screen can do multiple things based on where it is executed like the AC or one of several controllers. Prior to groups/scenes being defined this way, I think I would have defined multiple scenes with a controller being a controller in one scene and responders in other scenes.
  • I am not sure or clear about this part
    • If Insteon is selected at bottom right of screen is when you can define scene attributes that are specific to that controller such as On Level, Ramp Rate, and Retries
    • If Default is selected for the responder device, it will use whatever was defined when selecting the scene on left side of screen tree for that device. In other words, it inherits the managed scene definition

Is the above accurate and/or is there a better way to describe it?

• The types on bottom right of screen are typically values listed below. Documentation that I found did not define these very clearly so I feel like I am just surviving here.
  • Insteon
  • Command
  • Default
  • Ignore
  • Native was defined in one of the documentation files but seemed to be geared toward ZWave. I have never seen it on my eISY and IO have a few mixed Zwave and Insteon scenes. Was it retired?

Please help by refining my definitions / understanding and/or providing better sources of documentation.  Most docs I found defined scenes/groups structurally and not how to effect it in the AC UI.