I wouldn’t describe it as complex, just the bare minimum of what is required to actually preserve data with no loss. All physical mediums may degrade through physical processes, but redundant systems can do better.
I think you didn’t read correctly on the statement about the most complex system failing. I’m not saying that is the most complex system, I am saying the most complex system will fail.
It isn’t hard to seed a torrent. If a group of people want to preserve a file, they can do it this way, perfectly, forever, so long as there remain people willing to devote space and bandwidth.
LMAO at the idea of comparing every bit of every portion of every seeder’s copy with each other simultaneously and then cross referencing every parity file to be doubly safe, and then failing to see the chance of loss of parity during transmission of said files even after that. I will admit it would take a lot longer for a torrented file to degrade than some other forms of file distribution, but it’s not going to last for a thousand years, mate.