Reduction in surface area. Amongst the examined MOFs, it turns out that quite a number of them suffered from severe reduction in the surface area after activation, despite reporting successful activation in their original papers. As such, reduction in the surface area (i.e. difference between the theoretical simulated surface area and the reported experimental value) was used to quantify the degree of amorphization. More details about the procedure and assumptions are presented in the Supporting Information (section 2).