Article also says: "LUCA is the furthest point in evolutionary history that we can glimpse by working backward from what’s alive today." Which translates to:

Article also says: "LUCA is the furthest point in evolutionary history that we can glimpse by working backward from what’s alive today." Which translates to: first in time, IMO But my point was: LUCA described here is realy complicated so why it makes some new quality ? Maybe some milestone, yes.