Manual backups fall by the wayside in every environment I’ve seen them used. You are a better person than me and those are me.
I’m a big fan of backblaze for this reason.
As an aside, I’m surround by people who consider cloud syncing to be a backup, and just yesterday witnessed someone in the grief stage when they deleted a load of photos to save space because they thought they would remain in the cloud. They had even clicked through the “delete delete? Are you sure?”.
To be fair, Dropbox works pretty well as a backup (with the ability to restore deleted files via the web UI), as long as you catch it in the 30 day window.
When I worked there, I was surprised to learn that they also often act as mitigation for ransomware attacks (they could roll back your account in time if you contacted CS and explained your situation).
Usually, after I complete a major project milestone, or do a lot of housekeeping (computerkeeping), or just when I feel like it's too been too long since the last manual full disk snapshot, I tend to do one.
As an aside, I’m surround by people who consider cloud syncing to be a backup, and just yesterday witnessed someone in the grief stage when they deleted a load of photos to save space because they thought they would remain in the cloud. They had even clicked through the “delete delete? Are you sure?”.