Comment by sgarland

> have you ever seen a terrible db schema?

I am a DBRE, so yes, unfortunately most days I see terrible schemata.

> Having to suddenly iterate fast with a brittle codebase that doesnt really allow that ive seen bring teams to their knees for a year+.

IME, the “let’s move fast” mindset causes further problems, because it’s rare that a dev has any inkling about proper data modeling, let alone RDBMS internals. What I usually see are heavily denormalized tables, UUIDs everywhere, and JSON taking the place of good modeling practices. Then they’re surprised when I tell them the issue can’t be fixed with yet another index, or a query rewrite. Turns out when you have the largest instance the cloud provider has, and your working set still doesn’t fit into memory, you’re gonna have a bad time.