This RocksDB update will reduce the hardware costs of running a decentralized app (dApp). This would in turn help bring more and better dApps. Posters and bloggers need better dApps (better UI, better features, etc.) in order to have more fun and a better experience. So this update is about laying the groundwork.
Since Steem is a network with many owners (rather than a single company owning it), I imagine you could request a plain English translation from the community and the community will deliver. Communication is up to all of us. Many people are willing to help - it doesn't have to come from Steemit, Inc.