Imagine a newspaper publisher announcing it will no longer allow libraries to keep copies of its paper. That’s effectively what’s begun happening online in the last few months. The Internet Archive—the world’s largest digital library—has preserved newspapers since it went online in the mid-1990s....
But the fact that it’s relatively easy to download and backup makes me confident that someone, somewhere, will rehost it should it go down. Hell, I’d even take a crack at it.
It’s kind of the point of federation, too. An instance can go down but anyone who federated with them will still have that data.