Definitely true. In this case, where nodes are browsers (so clocks can easily be synced to within a few seconds of one another) and changes are user settings (so they change less than once an hour), a last-write-wins register seems like a great choice for an atomic setting like a boolean.

For settings where we can more intelligently handle conflicts (e.g. sets), we don't need the timestamps, because we can take advantage of vector clocks instead.