His record cannot be denied but I would. put it. down to more motivational slills, sometimes luck, formation of the premier league, the red scouse dynasty demise as a contender and fear through bullying players and media to never criticise him once on a roll (afterall the first 2 seasons he was a sitting duck woth the press and the rags were awful).
Did he bring in new fitness and diet ideas?
Did he revolutionise playing styles and how other teams across the pyramid?
could yohvsay what style of football they even played under him as a legacy?
His best skills wee making some bang average players believe they were good enough and become champions, motivate teams into solid units and control narratives.
One of the best man managers the league has seen but a pioneer that changed it? I would say only Wenger (to a degree) and Pep could claim that.