Just want to respond to @pfunk -
I'd say SBD has been a selling point, driving some investment in the idea of Steem in general, and in Steem Power. At least it was for me.
If there were no SBD option, I would have been cashing out all of my STEEM rewards as I got them - or whatever was left over after powering some of it up. So, the choice will come down to this for many users, especially those running businesses: Power up your STEEM, or sell it (relatively quickly) on an exchange. Holding the STEEM can really screw up your accounting if the price is constantly fluctuating by relatively large percentages, as cryptos often do.
The other option would be: Don't accept STEEM as payment.
Businesses need a reliable/stable pricing and payment system. You might find a few who are willing to dabble in crypto markets, but you won't get the widespread adoption.