Snapchat is user disempowerment patterns taken to their logical conclusion: The developer has full access to all their data, while the users have none.
The other big players have been moving in that direction, making it less and less accessible and exportable, but Snap takes the cake.
> The other big players have been moving in that direction
Not so, TikTok actively lets you download videos in a convenient format. I think that helped it grow too, since they embed a watermark and add a splash screen at the end. Certainly that's how I first found out about the platform. That said, this seems to be disabled in some regions (not sure if you can opt in).
The other big players have been moving in that direction, making it less and less accessible and exportable, but Snap takes the cake.