I think the core point isn't about coherence, but tradeoffs. Some tests are not worth holding onto: ones that are slow, flaky, and test code that is of marginal

I think the core point isn't about coherence, but tradeoffs. Some tests are not worth holding onto: ones that are slow, flaky, and test code that is of marginal importance. In those cases, the ideal tradeoff can be to delete the test. Perhaps to rewrite a better one, or perhaps to just 'eat' the risk incurred by removing it in favor of improved iteration times and the other long term benefits of not having to maintain it.