Deduplication is one the things that drove me to Borg: it has the speed and space saving of an incremental backup but every single backup can be used as it was a full backup.

It is also very easy to setup a pruning policy for old backups, so that you can say that you want to keep one backup per day for 90 days and after that only one backup per month for 2 years.

The dedupe in Borg is downright magical. I know I lose some space by keeping my hosts in separate repositories, but even then, I get insane space savings.