For me there are definitely two kinds of Lego users. Those who struggle with the building instructions. For them following these is almost meditative. Then there are those who don't and who have their own ideas. They will skim through the instructions and build the set once (if at all). And in general just welcome the addition of (new) bricks.

For me the resp. set served mostly as fuel for my imagination. If it was a spaceship, the next thing I would build was one. Just not the one in the set.

My dad built me a chest of drawers with lots of boxes for sorting Legos. And sorted them for me when he gave it to me as a present, for my 5th b-day. It was almost as tall as me at the time. I.e. I could just open and peek into the top drawer.

He also told me why it was important to sort the bricks again, after I deconstructed my opi:

I could let my imagination run free and find the bricks I needed quickly when building my next piece.

Before, when they were all a pile in a big box, very often the creative flow was killed by the annoyance of searching a pile of bricks for the one I needed. You start building something and eventually you just stop.

This thing looks like a tool for people who lack both. Sorted Legos and imagination.