18% of people running Nextcloud don't know what database they are using

https://programming.dev/post/36876896

If 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

Exactly. It’s not important … until it is. :D
The poll did not ask specifically for self-hosted instances. You know you can buy hosted Nextclouds where the service provider hopefully cares for that stuff? So customers wouldn’t know which database they use. I don’t know which database my mail provider uses ¯\_(ツ)_/¯

Fair enough, I did assume the target audience was selfhosters based on the question.

As for provider backups - well, you’d hope. But M$ doesn’t do user available backups, so I’d be surprised if that was bundled by the average SaaS provider.

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.