Is this AI aware? E.g. I read on your examples a complaint ahout too many tests for a fast moving startup. That maybe used to be true but with AI you can go for more coverage and may be faster and more agile with it.
I have worked places where the sacred test suite slows people down to a grinding halt but it is hard politically (as in convincing 20 people with different concerns) to get that changed without being CTO yourself.
But also I am thinking if tests feel "throwaway" and cheap to make then adding them is no big deal. If CI becomes too long just prune it up again.