[ajmurmann]

"I am sure if you were the CTO, you would have wanted your favorite stack to be adopted by as many people under you as possible."

I find this to be a very dangerous attitude and inappropriate for a mature professional like you would expect a CTO to be. Every technology stack had its pros and cons and which one is right for the job depends on so much context a large part of which is what your team is experienced with and what you already have in place. To move to a entirely different stack that the team is not used to requires do pretty solid reasons. Personal preference especially by someone who doesn't even touch the code should not be one of those.