There's a video that i can't find, where they show Raptor v1, next to raptor v2. The raptor v1 has all these wires, and tubes and looks crazy, next to it, the raptor 2 looks super sleek and not that complex. They ended up molding everything they needed straight into the block itself. Can only imagine what the v3 designs were since they are now all internal.

But what you get at the end with something like 3000 parts in it's BOM, to something like 20 parts in the BOM, because most of the parts were deleted and integrated directly into the mold.