One thing I’ve noticed from re-watching the video, is that smart layouts have (legacy) at the end. I think although this is a definite upgrade in a lot of ways, and aware of the need to keep smart layouts around, I still think there’s scenarios where smart layout might still be appropriate and not designated as the legacy approach.
Although I might consider renaming the feature if it is to stay around “Smart” vs “stack” would infer to new users that “smart” might be the superior layout option and cause some confusion.
Just thinking aloud here.