Nice write up!

One thing I would point out though: available supply is an interesting beast and as such was never really meant to track the annualized inflation rate of the Hive supply itself, so I'm not sure it's fair to use the term "what was scheduled" when referring to its rate of change.

If forced to try to calculate a scheduled rate for an essentially unpredictable thing, I suppose the best that could be done would be to do a moderate worst case analysis and assume the daily budget would max out every day and assume a fixed price of Hive (to eliminate the essentially unpredictable price of Hive from the equation).