I think it is less needed for now since we have HBD to HIVE conversions, and also I think the goal of witnesses should be sustain enough demand with interest that HBD being below 1.00 should be rare (but will still happen on occasion). For multiple reasons that hasn't happened so much in the past but should be better handled going forward.

I might still consider it though. Already the stabilizer does do a bit of HBD buying when it gets HIVE from powering down HP, but this is relatively small.