Remaining tasks not part of the first alpha release (see #6130 for the original list):

Media library:

• adding snackbar on upload start and finishing in Media Library #6545 Display snackbar when media has started uploading it's been decided we're not adding them as per this reason
• Async media: upload notifications for media library #6546 Notifications for media items
• Update messaging on failure:

Other items:

• (Async promo dialog #6467) Display a promotional dialog about async the first time a post is published (something like Hey, you don't have to wait for posts to publish anymore, you'll go back to the posts list and see the status of your post as it uploads? - we'll get some input from Editorial on this)
• Integrate video optimize processing --> ref: Async - Integrate video optimization #6134
• Update the page list to use the same design as the post list, so it can also use the design update