I attribute the speed at which incumbents are integrating AI into their products to a couple things:
* Whereas AI was a hand-wavey marketing term in the past, it's now the real deal and provides actual value to the end user.
* The technology and DX with integrating w/products from OpenAPI, SD, is good.
* AI and LLMs are capturing a lot of attention right now (as seen easily by how often they pop up on HN these days). It's in the zeigeist so you get a marketing boost for free.