I think it would be interesting to hear from CTOs from start ups of all sizes, from 1 to 100 employees. What has your role evolved into? Please be sure to mention which industry you're working in.
I assume that answers like this are difficult to frame because being a CTO probably has to deal with the individual situation in question/the reality of the affair in front of them. You might have to add more dimensions to your question to have it relate to you.<p>I say difficult to frame, but I do not mean to imply that there isn't a possible good answer that's informative.