Shutting down IA altogether seems unlikely at this point (even if legal fees are substantial). They've written before about what the decision means (this appellate court affirmed what the district court did last year) and it doesn't touch things like the Wayback Machine: https://blog.archive.org/2023/08/17/what-the-hachette-v-inte...
Keep a close eye on the inevitable lawsuits that they're going to be up against. Obviously the music publishers are currently trying to kill the Great 78 Project and I expect other industries to pounce. (Especially the gaming and media industries). I can't see the Internet Archive exist in 2-5 years and we need to prepare for the worst case scenario.
https://old.reddit.com/r/DataHoarder/comments/1bswhdj/if_the...