There is no way I’ll ever believe this was a matter of “personal convenience”. That could have been had without a server under her personal control outside the control of authorities.
This was done to evade established law and to enable her to destroy information if the need arose to evade prosecution.
She is a Clinton so “rules are only for the little people.” It tells us much about her character and I think it also explains the lack of enthusiasm for her by the typical democrat voters.
I think what you wrote about her having control of the information is not in opposition to what I wrote above. I also think there is something true about mixing foundation and official business.