Just now had a conversation trying to solve a weird case. Client was working on their project when the power went out and PC turned off. After rebooting and opening Ps, my plugin state was as if it was just installed. Local storage and PluginData folder were wiped clean.
Good thing I store plugin state as a backup when anything is changed, so we found the data in the v26 folder and user could import it via plugin. After importing, v27 folder had the backed up state again.
Not sure if it’s a bug or just some edge case, but figured someone might find it interesting and maybe some will learn something 