The real world equivalent that I can think of is being stalked even after moving to a far off location taking care not to leave a trace but inadvertently left one or two things around.

With many user hostile and invasive solutions, browser makers should take a stronger stance on clearing all local data simultaneously (cookies, local storage, IndexedDB, etc.). If someone wants a resilient client side data store, apps are one solution. Websites shouldn't be doing this or allowed to do this in a (standalone) browser.