Both sides will benefit, Democrats would get Downstate (which in my humble opinion should be called the Commonwealth of New Amsterdam after the most progressive city in Europe and in reference to the city's history), a guaranteed two
seats in the US Senate (+1 because Gillibrand did well Upstate in the last election, so 3
seats for the Democrats), guaranteed control of the
Judicial, Legislative, and Executive branches, and the once in a lifetime opportunity to write a state constitution to their own
liking (firearms rights applies only to military and police, right to choose for women, protections for LGBT New Yorkers, etc)