UpdraftPlus Backups is a part of our agency workflow. We use it to take auto-backups before updates, restore small sites, or migrate the db from staging to live sites etc.
While UpdraftPlus doesn’t officially support CP, turns out it supports all the way back to WP 3.2:
So I wanted to take UpdraftPlus Backups (free and premium) for a spin with ClassicPress. Turns out there was no issue!
I was able to create backups, restore backups, and use the auto-backups before updates. I was also able to export the database from the staging site URL to the live site URL, without issue. As far as UpdraftPlus is concerned, its WP 4.9.1 and 4.9.2.