One thing that seems to have changed is the understanding of impermanence. I loved the things I built with Lego but quickly had to accept that none of them was

One thing that seems to have changed is the understanding of impermanence. I loved the things I built with Lego but quickly had to accept that none of them was permanent. Kill your darlings to build the next thing. Being too enamoured with what you built before reduced your options for building new creations and you found that you loved nothing so much that you weren't willing to destroy it to accomplish your new goals.