When public-key cryptography became available to the public, it was assumed by all that it would be used entirely E2E. If implemented that way, then nation-states would be unable to access everyone's data on a whim. Thus, nation-states started the Crypto Wars.

What actually happened was that most people used cryptography to send data to servers which nation-states could at the very least access with a court order. So nation-states got what they wanted without doing anything. Thus, nation-states quietly gave up fighting the Crypto Wars.

Now, people are gradually returning to the original intent of cryptography (E2E). They could achieve real privacy, which means nation-states could lose easy access to everyone's data. Thus, nation-states are restarting the Crypto Wars.