What you can do with NNTP is run a local NNTP caching server. Then connect to that server instead of the real one. Your caching server can retain articles as long as you want; much longer than the upstream server.
(Though mere long article retention is not necessarily the best archive interface, of course.)
Disclaimer: I'm not well-versed in the solutions in this space. Maybe there is some NNTP cacher out there that also has a web archive interface into it or whatever.
(Though mere long article retention is not necessarily the best archive interface, of course.)
Disclaimer: I'm not well-versed in the solutions in this space. Maybe there is some NNTP cacher out there that also has a web archive interface into it or whatever.