Even if all network activity was cached, modern software has such layered complexity vs older software that I wonder how much things would truly speed up. It's

Even if all network activity was cached, modern software has such layered complexity vs older software that I wonder how much things would truly speed up. It's difficult for me to gauge overall effect between network reduction (say, 1% speedup across 50 concurrent and 50 inter-dependent network calls) versus complexity reduction (1% speedup across 5 concurrent + 5 inter-dependent calls).