Consider this image
How many individual pieces are present here? How many components make up the whole 3.0 board? Also, besides this image how many additional options and colors are available to you as the GB buyer?
Regardless of unlimited or limited GB. Consider the time required for machining, assembly, and design required for this specific board
Just from my past experience with Matrix Lab boards, this board will likely be an array of carefully considered pieces coming together to create a larger cohesive structure with an impeccable surface finish. There's usually many screws! and you will come to love your screwdriver... the customisation and personalisation with matrix boards is unparalleled. Matching accent pieces on Matrix boards to keycap tastes and other color preferences is something you don't get with other boards.
Can't compare the 3.0 to other boards with only 3 pieces of metal (top, bottom, weight) and a few color options