This article doesn't apply to every single use case and should not be taken purely at face value. A few week ago I needed to animate height for a banner like m

This article doesn't apply to every single use case and should not be taken purely at face value. A few week ago I needed to animate height for a banner like message that appeared in the layout (e.g. it was not absolutely positioned) once a user clicked a button. This banner message would cause a layout shift no matter what because its height was being added to the layout and shifting the elements underneath it down. Thus, to mitigate a jumpy layout, making the height animate made the layout shift easier on the eyes. And before you say "well design it differently" - I didn't design this.