We need a DNS server with a history database, not just a cache, preferably with a distributed history database.
Visit a website and it was blocked by the "official" DNS? Declare the IP invalid in the webUI (or the browser plugin) of the local DNS and it will get you the previous IP from the database.
Or teach people how to point to a different DNS server in an area with laws more amenable to their preferences.
Until coutry implement the great firewall and it becomes a play of cat & mouse.
Domain Name System was an app on the Internet. It wasn't something that always existed. The purpose of it is to provide intuitive means to look up IP address from more intuitive domain name strings.
If you could come up with an alternative system to derive the IP address of desired remote host, or content, e.g. Magnet Link standard, you can just skip DNS and switch to that instead.
TLS can be a problem as a lot of moving parts of WWW now depends on DNS. But all of those can be solved.
Brave browser launched a blockchain based domains registry IIRC.