Backup not getting staging site?

I understand that Hosting includes some incremental backups. But there are also nightly saves as seen in the site mainteance screen. It looks like only the live site is getting the auto backup, not the staging site. I see these as two parts of the same site, equally valuable.

The automation is redundant with managed backups. I'd prefer to see the automation go away and to see logs of the incrementals. I'd also like to see automated incremental logging of the staging sites. And then we can continue to use scheduled Managed Backups, Snapshot, or whatever other utility each admin prefers for doing their full backups.

Can someone explain in one place here where we're going with all backup mechanisms in Hosting?