AA is a bitcoin maximalist. He believes that anything an altcoin can do bitcoin can do either as bitcoin or on a sidechain and bitcoin will ultimately be the one world currency because network effect. I used to be a bitcoin maximalist in no small part due to AA's influence. However the blocksize debacle quickly disillusioned me on that. If bitcoin cant raise the fucking blocksize how the fuck are they going to implement instantx or whatever?
Anyway if sidechains can actually work(a big if in my book) I see no reason dash couldnt be a sidechain. The masternodes can be staked in bitcoin and be paid in fees. Even budgets could be funded with fees. We are already paying for those things in inflation, there is no reason they couldnt be paid for in fees if people really wanted a dash sidechain.