It’s a great argument for backups. I don’t think clod/DRM based services are the best backup - certainly they’re not a complete backup system.

If you have a local system and/or communication failure, or bandwidth limitation; how long to restore the backup?

A backup on a local storage should be possible to plug into another computer and access fairly easily.

Ideally your backup system will give some resilience against many types of risk scenario, especialy for the data you care most about or can’t go for a long time without. The fact that it’s harder to backup DRM stuff is a limitation - so I’d avoid DRM unless i don’t care about the thing.