Right now I’m creating a nightly restic snapshot of my server on borgbase and on some spare drives, and keeping the snapshots forever. There’s a ton of daily churn in my data though, between databases and logs and other files that don’t constitute ‘real data’ but might be needed to restore the app.
With borg or another deduplicating solution you could (probably) fit a year of daily in less space that the source takes. Of course depends how much the data changes over time. Highly recommend pika backup as borg desktop client. You can also easily do “smart” retention where only last week is daily, then weekly, monthly, yearly.