I think you're being intellectually disgonest now
Innovation isn't always radical, it can also be incremental. So yes, Klopp and Guardiola basically adapted already existing principles and it is impressive how many predecessors you can name for them but Magath is actually the perfect example why there is still innovation going on. He was indeed extremely obsessed with fitness and his players regularly had to puke during training or were so exhausted they could barely move. Probably no top team is training that hard these days but they are still fitter than his teams because of sports science. Clever people have found out that the human body needs pauses and they have found ways to conclude when it is time for a rest. I read somewhere that players in the 70s ran about 7 kilometres per game or so while Bender and Kehl in Klopp's Dortmund averaged almost 13, in some games even achieved 14. You can't possibly argue that this doesn't create the necessity to adapt decades old ideas. And you can go further and further with that. Performance diagnostics, nutrition, video analyses, even digital visualization tools that help coaches transport their own visions into the heads of the players. All this is evolving rapidly and top managers in football need to adapt to all of that in order to stay ahead of the competition. This becomes harder and harder the older you get, let alone with 70.
Why does that matter? We were speaking about top managers and current top managers definitely apply those principles.
And Inter under Inzaghi also plays highly organized and modern football. Not necessarily with lots of possession but definitely very organized when it comes to positional play. In fact they are probably the most fluid side in the world right now apart from the relationist teams like Diniz'. Their positioning is so fluid that at times the three CBs are occupying the CM positions while the CMs are dropping into theirs.