I love this thought. Initially, I was incredibly biased towards frontend as I was introduced to it before backend. Comparing frontend tests to backend tests (not even accounting for implementation), I am now a HUGE backend fan. We know pretty much every possible situation in the backend and can test for it, and in the frontend the possibilities seem to always be larger. But like you mentioned - and I completely agree with - we should create our implementations keeping tests in mind! Great work, Anthony!