Those who refuse to heed the lessons of history damn the rest of us to relive it.

It's not entirely accurate, what you say about knowledge not able to be lost in the digital age. Myspace had that mass deletion of music and content a few years ago when migrating to a new server. And the 2008 Universal fire destroyed a lot of back catalog work thought safe by a number of high profile musical artists.

One thing people should absolutely be wary of is being locked in by algorithms. The more you diversify your information input stream, the less likely it will be that bad actors can pull the wool over your eyes, as the Nazi's propaganda machine was able to do a century ago with a large portion of the global population.