I would avoid the counterparty risk of nostr.wine cellar when you can easily self host for <1sat/note. Mazin is a good dude, but no one is more trustworthy than yourself, and no digital skillset is more valuable than personal sovereignty
Discussion
My notes are public anyway. If I already had a Start9 server, I would run the RS relay server and manage it myself. But since I don't, it's easier and more cost effective to just backup to Citrine and cellar. Between the two, I've got redundant backup for a few thousand sats per year.