Actually old threads fall off the catalog, but aren't really deleted.
They are still available under the original URL, but images get lost, that's why I try to archive everything of value.
You can also go to the official 8kun bread archive by going to this URL:
https://8kun.top/midnightriders/archive/index.html
That's why I post the full URL per thread, because you can still go to it.
I could post these buns to your bread archive >>61239
Right now I'm posting current notables buns of mnr to /qrb/ into its own thread. >>145379
There is a lot to catch up to and 8kun isn't running that stable, so that will take a while. Good about that is that you can search through months of notable descriptions.
I also post using tripcode, that way people can get these notable bun posts via RSS too. See for example:
https://8kun.top/qrb/tripcode.xml
Don't worry, most is automated, I have to look through it sometimes and fix things, but it's working pretty good all things considered.
Right now 18k images/movies on mnr still needing to be archived.