The question is "why do they do it". And the answer is "cost".
It's not:
- because it's can't be done;
- because we don't know the way to do it;
- because it's better that way.
It's because it's very expensive. In your case, either because you don't create your whole system, or have a legacy system to use, doing it would be prohibitive. It's still a matter of cost.
It's not:
- because it's can't be done; - because we don't know the way to do it; - because it's better that way.
It's because it's very expensive. In your case, either because you don't create your whole system, or have a legacy system to use, doing it would be prohibitive. It's still a matter of cost.