“However, the company’s latest release, 75313 AT-AT, has broken from this tradition and some sub-assemblies within it are impossible to dismantle without resorting to using sharp metal implements.”
The whole point of LEGO is that you take it apart. The new AT-AT locks pins inside a Technic frame so the leg assembly can’t come out without a blade. Designers know this trap and have avoided it since 2009. This one shipped anyway on an $800 set.