Welcome to the Wyze User Community Forum @Lorentz! 
The introduction of Cam Plus Lite and the shift to subscription based server video storage was over a year ago. It was highly publicized, announced, and discussed thoroughly on all platforms of social media.
The catalyst for the change had nothing to do with the shift from the previous AI model, acquired by Apple, to the completely in-house developed AI model Wyze now uses.
The introduction of Cam Plus Lite and the limitations on non-subscription cams to upload video was purely cost based for the survival of Wyze in a post-COVID economy. Costs for Web Server Storage space skyrocketed and Wyze was required to make difficult decisions to survive.
There are many threads and links that chronicled this shift here in the forum. Here is one that may help you understand why they had to do this. Under the first post, you will see that there are 32 other threads that linked to this one. I invite you to follow those links as well to get a full picture of what was discussed last year in March.