One can look at it like how us developers look at testing. You have multiple steps on the way from code to delivery. There are unit test, more realistic test fr

One can look at it like how us developers look at testing. You have multiple steps on the way from code to delivery. There are unit test, more realistic test frameworks, test environments and then finally tests at a customer / usage by a customer. In the same vain I could see (and even hope) some mice tests could be decreased or removed as better models and simulations gets created. That would be quicker and more cost efficient for everyone. But in the end you want a real world test before giving it to a human. And maybe we could find better things than mice for that as well, but right now I think that is the best we have got. I am not a medical researcher though so I don't know if there are alternatives out there.