@travisdh1 sorry for late reply. we have everything explained on our website (as @scottalanmiller already said https://www.onlyoffice.com/onlyoffice-blockchain.aspx).
You can also have a look at this presentation https://onlyo.co/2D4DwaI
We do not expect storage space problems soon as we use the network for password storing and transferring only.
I'll have to look at the details, was anything done to lower the chain growth over time and change tracking resource usage?
At the moment the network is for testing purposes only, but yes we are working hard to prevent issues that might occur. We also presented this technology at two IT conferences in Europe, and the majority of questions asked were about the network))
Please, bring us some feedback whether it is clear and comfortable to use, we are eager to hear that