"Suppose a client and server were connected with a connection running with speed of light. Even then, there is some finite limit as to how many bits can be tran

"Suppose a client and server were connected with a connection running with speed of light. Even then, there is some finite limit as to how many bits can be transferred. How do we handle scalability beyond it then? By abstraction." Also by additional (independent) connections and parallel transfer/processing of those bits. Personally I think that abstraction (and especially its levels) should be governed by the law of diminishing returns, not by hard limits. The hard limits must be dealt with through other means.