I poked around in the (slightly verbose) documentation and stumbled onto this:
Servers should not re-use URIs, regardless of the mechanism by which resources are created. Certain specific cases exist where URIs may be reinstated when it identifies the same resource,
So I wonder if it has the same inbuilt limitation that IPFS has, which means you cannot just update the data you are sharing, without also having to create a whole new link (I know IPFS are trying to work around that, but have seen no decentralised solution yet).
I'll poke around some more!
Thanks for the link, I hadn't heard of them before.