- I use animation a lot, for many reasons, such as keeping audience focus on parts of the slide and visually explaining information changes and multi-step processes. It's particularly helpful for video. Figma already has much better tools for this; Google's are not particularly powerful and buggy as hell.
- Consistency. Google Slides will sometimes render the same text object with wrapping at different points on different machines. I shouldn't have to manually add line breaks to deal with this.
- Precision and flexibility. Google Slides just isn't anywhere near as smooth at design work as Figma. I don't even consider myself a designer and yet I regularly hit Google Slides's limitations.
- Layer/object lists. (Note: I don't see this in the Figma Slides demos, but I assume it's available in design mode?) Once you have a bunch of shapes on a slide, especially grouped, it makes selection so much easier. I don't want to play click roulette when trying to select one object from a pile.
(If you're wondering why I'm focused on Google Slides: Apple Keynote is great but can't collaborate through Google Workspace. I haven't used PowerPoint much, it's okay.)
UPDATE: I've now done a little playing with Figma Slides.
The good news is that it has an object list. But it's only in Design Mode. (So it won't be available to free or non-designer accounts - that's a Figma thing.)
The bad news is that in this beta the animation tools are even less flexible than Google Slides: you can only choose from a limited set of transitions; those transitions apply to the entire slide, not to individual objects; and there's no way to change the timing or easing. However, "smart animate" is one of the transitions, which does a Magic-Move-like "move the objects in slide 1 to their positions in slide 2".
(Note the emphasis on this beta. Figma Slides won't be considered GA until next year, so I'm hoping that all the animation tools from regular Figma will be available by then.)