I for one hope this never happens. Independents need to shit or get off the pot if they want a say in the nominating process. Liberals typically feel closed primaries obstruct the nominating process, but what they really mean is “dang it, NOW what can I do to screw with Republican candidate choices.
And that would work both ways. Choosing a candidate for president should be left to the most dedicated and involved in either party. And that is up to the individual as to how they want to dedicate their own involvement. Looking back at the primary season we just had, we can see the Open primary states produced the most capricious results that had no effect on the eventual outcome.