Hopefully we don't have a sudden influx of new accounts. According to @furion, @netuoso, and others, the network is iffy now, and dramatically increasing the number of users may well cause it to be unusable.
This is not my specialty, and I am not privy to the technical details. You might be, as a witness, though. Anything you can add to the issue with RPC nodes, and requiring more and more RAM to keep Steemit running?
On the witness side, things are pretty good. I personally run three 32 GB RAM servers for my witness, and I have a 32 GB RAM public seed node.
Steemit recently wrote a post regarding the scalability concerns. It sounds like things are under control.
https://steemit.com/steemitdev/@steemitdev/steem-blockchain-update-august-2017
Thanks for that link! Imma read it.