I know you have said it at the beginning of your post, but I have to mention this:
Steem Dollars are referred to with the symbol SBD, an acronym for Steem Blockchain Dollars
source - the whitepaper
I know there is a lot of confusion about SBD acronym but since you have made such a technical post, I told myself that this could be fit here :D
That is surprising :D I have never heard that before (never read the white paper completely either though ;) )
'Steem-backed dollars' makes more sense doesn't it? Steem blockchain dollars sounds like that drink that added blockchain to its name. :D
I'm 99.99% sure that the original whitepaper said Steem-backed dollars :)
I know that it sounds strange, I was surprised too when I saw it for the first time, but these are the names that were chosen, I don't know why. maybe to sound more like blockchain stuff :))