Otto18% of people running Nextcloud don't know what database they are using
SparroHawcIf you’re running it in a prebuilt container, as long as it works it shouldn’t matter.
Of course, when your database gets corrupted after Nextcloud updates because you had an app running that isn’t supported in the new version, it will suddenly matter a lot.
And if you don’t know what database you’re running, how are you backing it up?
If you don’t know what database you’re running, are you bothering to do a full shutdown before backups? Are you doing backups at all
If you’re using the AIO image, backup/restore can handled for you, so no need to worry about the manual steps involved. Or if you’re using a VM, a backup can take the form of full system snapshots, so also no need to understand how data are stored.
Granted it’s always helpful to know what your running, but not necessarily requisite, even for backups.