Background. Even though PoS solves the mining scalability problem, there are other scalability issues that limits Ethereum from replacing, say VISA:
- The blockchain will grow many gigabytes per day, possibly even terabytes (depending on the size of each transaction). This means, in order to prove that your coin is legitimate, you will need many terabytes and it keeps getting worse over time. You may prune your local database, but in order to prove the legitimacy of your coin to a new comer, you'll have to give him those many terabytes.
- The transactions are currently broadcasted globally. E.g. if I buy one coffee cup at the local store, the entire world hears about its transaction. We need to have some scalable transaction summarisation.
Questions. Does Ethereum have any plans to address such scalability problems? If so, what are the plans so far?