Answering because I know the answer, even though I disagree:
There are some situations where having some animation can "attract attention" to parts of the UI, for guidance ("there's some info text here"), feedback ("operation complete"), state changes, timing. All this of course doesn't apply to decorative animations.
With that said: a lot of the situations I mention above are manufactured. They are often because of changes happening away from the mouse, or because the interface is brittle or too slow, and the user doesn't have confidence that something really happened, or because the organization of elements is not functional and things are too far apart that the user might miss something in a totally different part of the screen.
IMO, with enough thinking you can come up with alternative interfaces that don't require animations at all.
There are some situations where having some animation can "attract attention" to parts of the UI, for guidance ("there's some info text here"), feedback ("operation complete"), state changes, timing. All this of course doesn't apply to decorative animations.
With that said: a lot of the situations I mention above are manufactured. They are often because of changes happening away from the mouse, or because the interface is brittle or too slow, and the user doesn't have confidence that something really happened, or because the organization of elements is not functional and things are too far apart that the user might miss something in a totally different part of the screen.
IMO, with enough thinking you can come up with alternative interfaces that don't require animations at all.