Honestly not too familiar with that. I imagine if they’re touting this as a new thing, FRP either does something different or was lacking compared to this in some way.
Though it is Google, they could have just killed FRP in favor of this and added messaging features like they do with everything else
I feel like modern day mega stuffed is what double stuffed used to be. Normal oreos now only have just enough of a thin layer of cream to get away with not being sued for false advertising