Love the idea of using spark joy for one's tests. I have definitely seen teams not delete tests due to fear.
This actually goes for all regression tests not just automated ones. :)
I've seen this as well, but in some ways I can understand a bit. Some people don't want to delete tests because they are afraid that product managers will change their minds in the last minute. However, if done right with version control, I don't think this should even be a problem.
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