The short answer for why your login needs to be more complex is that hackers leveled up.
While the ongoing development of quantum computing is a real threat—since it’s capable of testing nearly infinite keys simultaneously—you do not need a supercomputer to break a weak password today. A modern graphics card, the kind found in a standard gaming PC, can shred a basic 8-character password in under sixty seconds. If a hobbyist can do it, imagine what a professional syndicate can do.
