I manage an average sized Nextcloud instance, and see these mails every day, but I believe you can change their interval to something longer under your personal

I manage an average sized Nextcloud instance, and see these mails every day, but I believe you can change their interval to something longer under your personal settings. Also, you can disable server notification on your client. If you want to go nuclear, you can disable update notifications altogether under administrative settings, I believe. On the other hand, I mostly charge my iOS devices at night, and they handle updates & backups when they are charging. I didn't see an app updating midday for years, I believe. Nextcloud is a bit too noisy on the app updates department, though, we can all agree on that.