I'm pretty close to getting a cx bike. It would be instead of a mtb and winter road bike but I have just been advised not to use it with Hamax child seat.
Can't see any reason why a given cross bike would be weaker than a random MTB. Specific model vs specific model sure, but as a generalisation I can't see it?
I have a handful of KOM's with this bike and have also ridden the family trail in the Forest of Dean with Hamax + boy. If ever there was a do-it-all bike..............