Question: I have a content type that has a mix of user-editable fields and auto-populated fields (from an external source). I would like to mark those fields as disabled right when I create them so the user cannot overwrite them. I know there are readonly modules and ways to do this in hook\_form\_alter but I'm curious if I can short circuit having to do this on the fly and just have it disabled by default. Thanks.

Answer: 
The simple bulk action support in Drupal 8 core does not currently support this feature.
If you need "select all" you can use the module [VBO](https://www.drupal.org/project/views_bulk_operations).
Then you can replace the field "Node: Views bulk operation" with the "Global: Views bulk operations" which supports selecting all rows.