> Snapshots of working set would be taken on a daily basis in hopes of keeping recovery under ~5 minutes during service restarts or updates. Exactly this. We

> Snapshots of working set would be taken on a daily basis in hopes of keeping recovery under ~5 minutes during service restarts or updates. Exactly this. We took hourly snapshots (for a trading system), and could restart the system in a second or so. Another nice side effect of an event driven system is that you start to think about what other data you can put in there. And then you realise you don't necessarily need a database any more, which makes the architecture of the system simpler. There are so many benefits working with a data-driven system. Once data is in the log/ledger/whatever you call it, it's immutable, which leads to parallelism if you want it. Ensuring the system is idempotent also means you get (easier) failover as well.