I would not say that DAI is fundamentally better than bitUSD. I think they made some bad design choices in bitUSD but the idea of the implementation is very solid. Easy fixes exists and could be implemented. post on bitUSD The problem seems to be more the bitshares community than anything else. (Also bitEUR is still doing fine even in the bear market showing that it can work)
No need to talk about SBD, that is not really a stablecoin :)
DAI also has some problems, mostly that they collect fees without any fundamental reason. Right now that may be an option but soon we will have the same utility on ethereum without artificial fees. I am also not so sure they could survive a massive cash out, but I need to look at the details much more before making such claims.
It is true that DAI is very expensive to create. But they have shown:
What do u mean with same utility on ethereum without artificial fees?
I think that you can build a stablecoin without having a governance token (MAKER) associated to it. This seems to be just overhead so that the creators can make money. Of course this is legitimate as they put in the work.
But a stablecoin smart contract can be realised without governance. There is no incentive to build that as there is no money to be made, but eventually somebody will realise this and as a user the question then is why pay fees for something that is available for free. Right now the marketcap of maker is 6 times higher than of DAI. That does not seem healthy to me in the long run.