[gt565k]

Couldn't have said it better myself. Overzealous testing while building an MVP for a project is just a waste of time as the code gets thrown out and redone so many times before it gets to the end user.

On the other hand, if requirements are mostly defined from a UX/UI workflow and and business logic perspective, that's a whole other story. Then it's easy to justify testing everything, as the expectation that the requirements will change is fairly low. Unfortunately, most companies don't follow the correct way of building software because it requires extra upfront time and resources.