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.
I would do it only if I was organizing the IRL community on the internet that I have direct involvement in.
If there would be new IRL community that need a digital space, (theoritically) I would go around and talk to the lead (or be the lead) and crete a space for the people to use.