Hey Chris! Generally, Prisma is stable. We are moving fast with new features, so when upgrading to a new version you might encounter some troubles. We are combatting this by providing solid upgrade guides.
Furthermore, we established a new release process that includes alpha and beta periods, which gives us and the community enough time to battle test the changes. Before a change hits production, it is going through 2 weeks of alpha and 2 weeks of beta testing.
You can read more about this here:
https://www.prisma.io/blog/improving-prismas-release-process-yaey8deiwaex/.