Longtime rails dev here, the biggest problem I keep running into is testing at inappropriate levels. For example, writing two cucumber (or system) tests to conf

Longtime rails dev here, the biggest problem I keep running into is testing at inappropriate levels. For example, writing two cucumber (or system) tests to confirm conditional rendering or search filters or some such. These are more appropriate as a view or model test (respectively) and running them naively through the full stack is a huge amount of overhead waste. At an early stage startup with a small app it might not be as big a problem, but where I'm at right now the app is over 10 years old and our test suite with many many parallel workers is still well over an hour cycle time to get that sanity feedback on a commit, and it's painful.