I think testing is very important. But it's very hard to test everything. (It is not hard to get 100% test coverage by some metric, but that does not mean that

I think testing is very important. But it's very hard to test everything. (It is not hard to get 100% test coverage by some metric, but that does not mean that all scenarios or even the most useful ones are covered.) So it's an economics game: how can you get the most value for the least amount of money? Or if you want me to rephrase that in a more-positive way: how can you get the most value out of the time that you have available? And I contend that a shift "up" in the pyramid (at which time it looses that shape, hence the "testing trophy") is where the current sweet spot lies. You have to use the tools that you have.