[jessaustin]

...localstorage and important data should be mutually exclusive.

It seems like we could say "don't trust this" about any aspect of any platform. Categorizing every application as "really important, don't update the UI until securely written to three AZs" and "totally ephemeral purge every minute" excludes a lot of stuff in the middle. Sure, nothing made by humans is perfect, but many things could be improved. One improvement to localstorage would be to simply not delete all the data.