In startup parlance, by the time you need to shard your DB you have already solved the hardest business problems. Without being to condescending to our 'inner

In startup parlance, by the time you need to shard your DB you have already solved the hardest business problems. Without being to condescending to our 'inner engineer' - doing things at scale is relatively pedantic compared to building something that people want to pay for in the first place. Yes, some of these problems are hard, we need to respect that - but they are ultimately, mostly problems to be solved - like difficult questions on an exam. You'll find the path through and that's that. It's more akin to operational complexity, just a party of doing business smartly.