Hey there, thanks for the comment.
Honestly, you are not wrong, no one is. I do agree that 13 week, while it might be a good thing six, seven years ago. I do think that most people are used to "give it a shot, didn't like it? Take it out" mentality in the cryptocurrency world nowadays. It is not something that's not changeable though, we also have discussed that on and off to encourage people to have "less risky" (in a sense) investments towards Hive Power since they can take it back easily in a relatively timely manner, as opposed to 3 months.
We can sustain the 20% today and even tomorrow, but every HBD is technically a burden on HIVE, since it is backed by it. If the market moons, we're golden. But the important thing is the worst case scenario.
RE: Decreasing HBD APR and Posting Rewards and Increasing the Importance of Hive Power (HP)