I feel this, especially with the crazy lengths people go to mock things sometimes. A couple years back I was having a discussion with a friend/former coworker about testing (I was griping about unnecessary mocks I had to deal with for something at a job causing unnecessary extra work), and he asked how I would approach trying to get full unit test coverage instead. I was taken aback and said that I wouldn't try to get literally everything covered by unit tests in the first place. Most of the teams I've worked on have had the approach that test coverage is good, but it isn't necessarily going to be 100% even when considering all tests; I can't even imagine trying to get 100% coverage for unit tests alone being anywhere close to worth the extra effort, let alone the contortions that the code would need to take to support it.