Artemis might use a swipe gesture to visually hint at the relation between upvoting and boosting, as shown in the main animation. Here’s a static app mockup with both swipe levels displayed. I’d also imagine that there should be a setting that auto-upvotes posts when boosting.
Really cool design, would it be snappy? I mean if you slide a bit it snaps to an upvote, so it’s easier to choose the action you want to perform.
Yeah, one common implementation is to slightly snap the block to the closest value. It’s not too drastic though, so the switch between icons/backgrounds itself is snappy, but you’re still free to slide the block.
But overall it’s up to developers :)