In this video you use Y to detach some sub-coponents elements, like panels.
But im not sure what is the advantage of this, ¿is for avoid some kind of problems modifying the panel surface that can affect the rest of the mesh?
Hi David,
Please add timestamps (at what time in the video does it happen, what you are referring to) next time.
At ~7:39 Chris explains why he Separates part of the Mesh with Y: if you don't do that, Loop Cuts that you create through the panel, will pass through the whole Mesh.
Usually it's out of convenience more that anything. When modeling there are always 10 ways of doing something, and each one is as correct as the next one. You'll see different people or different teachers taking different approaches all the time. You'll develop your own in time as well.