I think it’s mainly a QA topic.
Opencv’s test suite can have hundreds of tests per module.
Although many improvements are made from hundreds to a few tests failing, as far as I’ve been able to check a few weeks ago with a pre-4.3 version, not all are yet perfect and if one among the many tests failed, it would report the module as failing, even if this is just a corner case.
I don’t know about NVIDIA’s QA requirements, it may be less or more restrictive… Someone else may better comment.