Seriously man, Nolan outdid himself in terms of screenplay complexity and delivery..
This is his most complex subject so far. All I can say is that if there is any director in the history of film-making who could have pulled off TENET its Nolan. His strength lies in blending the art into the commerciality. Special shout out to the entropy reversed action sequences which requires multiple viewing to get full grasp of, but, boy they gonna blow you off..