Neither of you is "right" because there is no general "right" answer, it will always depend on your specific situation. If the CTO has given this thought and de

Neither of you is "right" because there is no general "right" answer, it will always depend on your specific situation. If the CTO has given this thought and decided against it then leave it be. If its an oversight or under-researched topic then it doesnt hurt to take some of that research load and become the advocate. However, something I didn't learn/internalize until later on in my career was that not everything is your call. In this case, you absolutely should defer to the CTO's judgement because, you guessed it, it _is_ his call. He is the one ultimately responsible for these decisions both in authority and blame. If hes "wrong" and you are spending more than you should then thats on him. But being in his CTO position has earned him that right, you should respect it.