Currently Ethereum is using Proof of Work (PoW). From my understanding there is a limit of time between blocks for two reasons:
- Part of that time between blocks represents the time to solve the PoW puzzle. It is kept at a certain value in order to provide a reasonable entry barrier to the blockchain.
- The second reason for some time between blocks is for the blockchain network to have time to distribute all messages
If we move to PoS, essentially the first reason is not of importance anymore. Does that mean that we can have smaller times between blocks?
Also lets say we have a private blockchain with a small number of miners next to each other in a datacenter. Does that mean that we could have a very small time between blocks since the miners will distribute the information very fast between them?