86% of unicorns have grown headcount in the last 12 months (cbinsights.com)

mandatory tish-boom: if they have grown more than one head, haven't they grown more than one horn? so.. how are they unicorns any more?

Is the ratio of heads to wings and legs and new category accomplishments balanced right? Referencing SpaceX, Tesla timelines as two exemplar. What does a magical 12 month unicorn do?