This is all being done in parallel and will mean we can have data proven to be network guaranteed. So will potentially solve many issues
- Archive nodes (the nodes with long lives and good resources) - something we were looking at post launch [check past forum threads]
- Recovery of worldwide outage of the network
- Facilitate ledger based SD (I need to RFC this, but basically you should be able to add a
ledgerflag to any SD and it’s stored forever). Imagine you want a receipt for a safecoin transaction, then you have it, or comment history etc. Or even you want a ledger based currency for businesses etc. … - Linked chains, those links in chains across chains, allowing graph analysis of the network over time (without time, just entropy).
- … I don’ think this even scratches the surface, but will make offline data very secure and the network much more able to maintain very high levels of integrity at the very least.
There are some limitations for now, like having to present the chain to a group that can attest to the last signers of a link having been known to the network. I suspect a few more areas like this, but we will hopefully be able to document these limitations. The one I mention is recoverable though with a slight change to node startup.
But, this is a side project/play area for me (that Viv and Andreas have poked at already and will several more times to find fault) that I hope to complete in next few days, then present it again. It may fail 
so in the spirit of openness it’s happening in the wild. I think it can easily show a fully decentralised blockchain type device for many different chains of data that also interlink easily (so sidechain type functionality) and a little bit more. I suspect the wider community will “get this” and it may help folk understand the decentralised approach to cryptographically secured data of any type.