Since we no longer have the hyperinflationary model the rational for it is gone.
Granted, we did away with hyperinflation, but there are other benefits that are just as valid to helping noobs understand and adopt SBD and Steem and easier for merchants to understand. Isn't that just as important?
Can it be sustained and paid for with the Steem price so low? That seems to be the real issue. Is it being managed right?
I know some of my friends joined because they liked the simplicity of the SBD. It's easy to understand for them
I don't think there is any way to know for sure. These are new realities and it is all very experimental.