I'm guessing at the start it was incredibly easy to stick things together, like two Lego pieces. After a few thousand years and a few interesting Lego builds, s

I'm guessing at the start it was incredibly easy to stick things together, like two Lego pieces. After a few thousand years and a few interesting Lego builds, some with interchangeable brick complexes with one another, a great calamity destroys the majority of those builds, leading a sparse minority of builds which seem to have legacy interchangeable brick complexes still for reasons unknown to us