For me it’s the super compact view that I miss. None of the other apps comes close to how clear and tidy Sync looks, and none have the option to put the preview on the left and the “view” button on the right. I guess I could get used to it being different, but currently I have multiple Lemmy clients installed but I keep gravitating back towards Sync even though the posts aren’t marked as read which is seriously annoying.
I have a foldable phone that also has a very slightly curved front screen (Honor Magic V2). It’s perfect. You can barely see the curve, no weird reflections, it just feels very good in the hand, there are no sharp edges at all. Feels very smooth and nice to hold and use.