I know nothing of Safecloud, but freenet failed for a very valid reasons:

1. Data retention isn't infinite. If the source disappears from the network, peers will prune it shortly. This is exponentially true in our multimedia-heavy world.

2. Despite 1, if you actually want to delete something you published, you can't. Absolutists will see this as a good thing. Normal people will see this as a problem.

3. Peer-to-peer doesn't work in a mobile-first world, and not enough people will host nodes as a hobby. If all website publishers/hosters have to host a node, then we're just back to the current model but with extra steps.

Closed-garden mobile-first tech feudalism lobotimized the Internet. I remember trying out the Freenets, I2Ps, and whatnot in the 90's. Too cumbersome nerdy tools to use for anything actually worthwhile. It was born in the idealized world village of the 90's Internet. Maybe real life doesn't work like that, and the lobotimized centralized tech will eventually win.