Which ones? At least in the last 4 years, there was no AI winter.
The late 70s, again in the late 80s. See wikipedia.
https://en.wikipedia.org/wiki/AI_winter
History started well before 4 years ago
alt Hacker News
The late 70s, again in the late 80s. See wikipedia.
https://en.wikipedia.org/wiki/AI_winter