Schema management is not too hard at small numbers of devs. We have a monorepo and a well defined data access layer in the monolith, so simple migrations, grep, unit tests, and frequent deploys are enough to handle 99% of needs

The harder part is ensuring people don’t hold onto connections during long-running operations. In some client libraries, it’s easy to accidentally hold one open. That plus autoscaling results in ticking bombs that are hard to catch with automated tests