Well, for this case, I prefer simplicity over performance :p. I put my trust in Vue diffing algorithms to not mess up on the states/data change xD

Actually, IndexedDB consumes more resource (memory) than localStorage so I tend to avoid that unless I store/cache a huge amount of data (e.g Blob, File, or generated content)

Btw, what do you think about this convention https://github.com/sveltejs/rfcs/blob/reactive-assignments/text/0001-reactive-assignments.md ?