If I've learned anything over my career, it's that tests are treated as write-only code and they forever accumulate. Not only are they a burden in terms of comprehension, they have a measurable cost as your CI/CD pipeline becomes ever slower or requires more parallelism.
I've worked in so many places where a test suite suddenly takes a day to run with no parallelism, and requires 50 other machines to get it down to 20 minutes. And so many of the tests that waste so much time are down to them being pointless, or being stateful for no reason.
I constantly advise people to stop writing obvious bullshit tests (e.g. the kind of test in Rails where you just assert that you wrote `belongs_to :some_model` in your model), or ones that are too heavily mocked. Focus on your business logic and the inputs and intended outputs, not how you used a framework or dependency.
Also: nothing prevents us from deleting tests and do as if they never existed, except the nagging voice of sunken cost.