I'm curious what kind of app doesn't already require tracking state on the client...? Very confused about your objection, but probably just because of inexperie

I'm curious what kind of app doesn't already require tracking state on the client...? Very confused about your objection, but probably just because of inexperience on my part. It seems to me that basically every web app I can think of (e.g. Facebook, Figma, ChatGPT, Spotify, Discord) revolves around the server and client sharing some responsibility for tracking and updating the state. If your objection is that we should just have state as a DB table on a server and just sync it to the client as needed, then that's basically what this is -- just with a client DB instead of a client Redux store/bespoke javascript mess/etc.