What laypeople consider as "happened" and what those in the know consider as "happened" are very different IME. For most people, they'll consider self-driving

What laypeople consider as "happened" and what those in the know consider as "happened" are very different IME. For most people, they'll consider self-driving as "happened" when most cars are self-driving. Similarly, the consider the smartphone as "happened" not when the palm came out - but somewhere around the iPhone 4. Like, right now, immunotherapy for cancer has "happened" - there's real patients really doing it, for real. But most cancer patients don't consider immunotherapy as "happened", they're still getting chemo. Once chemo is obsolesced, we can consider immunotherapy as "happened". From then, to now, may be on the scale of decades.