Which speaks more about the growth of popularity of arXiv or the total number publications, rather than AI+ML specifically.
Presumably people are scrambling to publish what they have, so it is clear what work is independent and what is derivative.
We're rapidly stumbling into the future of media.
Who would've imagined a year ago that trivial AI image generation would not only be this advanced, but also this pervasive in the mainstream.
And now video is already this good. We'll have full audio/video clips within a month.
Plus then maybe we could get a computer to tell us what thioacetone smells like without actually having to experience it.
It's at the very least 5 years old: https://arxiv.org/abs/1710.00421