Héhé.
You're a little teasing, Pilou. Not easy to explain.
I try with an simple example :
To arrive to this box, with C4d, one of methods is to create a box, to edit it, put it in a HN (HyperNurbs), select the face from the top of the box, and inner extrude, extrude, ... and knife to create the bevels. It's not really fast.
The result :


With MoI : One box, copy paste, scale, boolean, and Fillet. That's all. Very fast.
The result :


The render in C4d of the two objects :



But, for me, the two methods are their advantages and disadvantages.
With C4d, the advantage is than after the creation, all can be modified. but the creation is longer.
But with MoI, the advantage, for me, is the easiness to create complex technical objects, and it's a pleasure to create with the efficient boolean. But, after export, the file is bigger.

In fact, all depends of the objects. For "soft" objects, I think C4d better. But for technical objects, and with objects than we know they will not to be modified, MoI is better.
I think the two softs are complementary. It's for that I try to mix the creation of differents objects of the at-at.

But I repeat, MoI is a fantastic soft (like c4d of course), wich became quickly essential. :-)

I hope you will understand what I'll try to explain.