Depends on the threat model.

NOAA and others gets underfunded/change of menagement and need to close down open access to stuff.

or

Data becomes illegal to possess and feds start knocking on Web Archive doors.

or

Web archive will do something stupid and will get sued/DDOSed

In only one very unlikely scenario it won’t be availble due to recent events. But still redundancy would be good regardless of recent stuff.

https://wiki.archiveteam.org/

they have an automatic VM that dowloads stuff in distributed manner and uploads to archive.org