Currently using FreshRSS and happy with it. Granted, the fact that it installs on a server means it's not for general use though.
I tried using it for a while to check if it would fundamentally make me feel different, but after a couple of years I saw zero benefit.
What are people using that they really need this for?
I suppose it depends on how you consume your feeds: do you look at the latest, like a social media timeline? or read every entry of some blogs, like an inbox? I definitely have some feeds I consume like the latter, and I need that to persist and sync.