Nobody proposing very specific technologies here seems to be taking into consideration the cost of the resources who have competence with those technologies, an

Nobody proposing very specific technologies here seems to be taking into consideration the cost of the resources who have competence with those technologies, and how easily these resources can be located and recruited. A good CTO will always look at non-technical considerations of this nature because, in most cases, your ability to deliver is not just about the technologies you select.