I use syncthing to sync almost everything across my computer, laptop (occasional usage), server (RAID1), old laptop (powered up once every month or so), and a few other devices (that only get a small subset of my data, though). On the computer, laptop, and server, I have btrfs snapshots (snapper). Overall, this works very well, I always have 4+ copies of my data in 2+ geographical locations.
Building nuclear power plants is not a science problem, though, it’s an engineering problem. Just because we can harness energy by breaking up nuclear bonds does not mean that we can do so economically, given the constraints under which we have to operate power plants.
And OP never disputed the science anyways?