[UltraSane]

All good backup software should be able to do deduped incremental backups at the block level. I'm used to veeam and commvault

[burnt-resistor]

That costs even more, unreuseable time and effort. It's simpler to dedupe at the application level rather than shift the burden onto N things. I guess you don't understand or appreciate simplicity.

[UltraSane]

This article shows it really isn't that simple and is easy to mess up. Who cares if your storage and backup software both dedupe?