In a statement to Tech Insider, Hyperloop One said that BamBrogan "decided to take a step back" from the company while thanking him for his work on the project. CEO Rob Lloyd told Engadget in an interview last month that he projected 2021 as the date when we'll be traveling in tubes, but noted that the method of travel for freight could happen sooner. That propulsion test was certainly a major step towards achieving that goal, so it will be interesting to see if the staff shuffle causes any setbacks. Last week, Hyperloop One announced a deal with the Russian government and Summa firm to explore the possibility of the system being used for shipping and to replace Moscow's train system.

Update: A Hyperloop One spokesperson sent Engadget the following statement: