It is not just academic issue. It is going to be a very big issue - and with all the Bernie supporters having a visceral memory of how it went last time.
In the short run the DNC wins. They just continue to tell Bernie to deal with or they will make some minor adjustments.
In the long run though, Bernie is holding the cards here. All of the energized democrats are over in the Bernie wing- not the DNC Dud wing. He knows it. The "progressives" know it, and the DNC knows it. If he does not get the dem nomination because the system is "wigged" as he says then this is his last hurrah and he is not going down easily. He is basically asking the dem party to tell him upfront if it is still going to do this superdelegate scam or not, because he and his supporters want to know so that he can go third party if so.
And yes, I see y'all out there shakin your heads and saying that he would never do that because it would just divide the dem vote and ensure the election of the republican. Dream on. This is Bernie's last hurrah and he is not worrying about that. He took one for the team last time and stood down and supported Hillary even though the DNC had rigged the primary against him. He wont allow this time, and as I said above, all these blue wave types that the DNC is so proud of are actually Bernie or a non-DNC type supporters. And the dnc is already in a pickle because even if they can fend off Bernie it will be by putting up another candidate who is supported by the far left- thus setting them up for a beating by the republican candidates candidates who will continue to successfully allege that the dems have abandoned the working class middle.
The dems got problems- big ones - and showing voters how to hate Trump even more is not going to work.
And yes, in regard to yesterday's discussion, I agree that Trump will have a problem with his base if the wall is not built but I dont believe that it is an unmanageable problem as long as he does not give anything away while he is working on getting it included in an immigration bill. Its if/when he gives something away such daca, chain migration etc with no wall that he has problems.