It has been in testnets so far.
In a small network of 2 sections the keygen would take 6ms if there were 100,000 sections (say 2 million node network) then the keygen could take about 2 mins, however if we dictate the range within a section this could go up to several 10’s of minutes
see this link for initial working from Ian as well. Data Chains - Deeper Dive - #28 by mav