There are alternative archival sites, some that operate outside US tampering, but IA is certainly the primary.

Unfortunately, the IA is absolutely massive. Anyone backing up anything is just grabbing what is personal to them, hopefully in a way that the pieces can be authenticated and re-assembled, but unlike Wikipedia we aren’t talking about copies of the whole thing, not even close. I think they are near or recently over 100 petabytes? Much will be lost if/when the IA is eventually targeted and disabled for whatever reason they come up with.

If the IA were to be backed up at any meaningful scale, I would think to ask the British to encourage their Museum to embrace the stereotype that they readily take everything, and apply it to the internet. America can no longer be trusted to house any accurate history of anything.