I did have pleasure of working on a system where we had 60k concurrent writes (cloud storage, bulky writes, a lot of data) - it's really not a rocket science if

I did have pleasure of working on a system where we had 60k concurrent writes (cloud storage, bulky writes, a lot of data) - it's really not a rocket science if it's not complicated and short messages + views on them is not that complicated. Computers are really fast today, you just don't do stupid things. Scalability problem has been already solved at twitter and there is nothing inherently complex with serving short public messages. Most things don't need to have short latency and they don't need to be 100% precise. As an example currently whole stack overflow runs on 9 on-premise servers.