To sync across different devices maybe?

Depends on your use-case obviously, for me it's very nice to have all feeds and read status on all devices (laptop, phone, tablet) and don't need to add a new feed to all devices or set it up again when I change phone, reinstall Linux etc. It also has user-management, so you could have accounts for friends and family and even expose it to the internet (which I wouldn't at this point) or but it on a private mesh / vpn like Tail-/Headscale.

Edit: Whoops, I was talking about self-hosting. Having it as a web service has the same benefits if you don't wanna tinker with tech, obviously, (with the caveat that people from that service know what you read ...)