It would be nice if my settings were server-side so that I didn’t have to set them on every new device. I always want Dark Theme, I always want the same sized text box, and I always want sound effects off. Personally I don’t see the need for a per-device override, but some users may want that.
Also, my settings keep getting wiped out and one day I’m suddenly back to light theme, sound effects on, and a changing text box size… I suspect this is due to the way settings are stored as local storage combined with certain server-side updates fragging my local storage, and so am leaving the note about it happening hear rather than as a unique bug. Storing everything server side would fix this, a two-for-one deal!