And in the face of gaps of the test suite there's no assurance that consistent output will be preserved across releases of the same application. This is somewha

And in the face of gaps of the test suite there's no assurance that consistent output will be preserved across releases of the same application. This is somewhat mitigated by the slow release schedule that these kind of projects usually have, couples with a feeling of "being done" meaning that releases shouldn't have much green field feature development work. But still fixing one bug could cause a regression elsewhere.