This question comes with an answer that I obviously realise that it works for me and that’s what is most important.
But I am interested in understanding your take on splitting quads on a separate day to glutes & hamstrings? For me it allows me to connect a lot better to the muscles being worked and Allows for no added fatigue from super setting quads with hams for example.
All about adequate stimulus. What’s adequate for some, won’t be for others. So whatever gets put first, especially in leg day really gets prioritized. For some, what gets trained later in the session is still receiving “adequate stimulus” to grow. For some, it won’t be. (And what determines “adequate” is still a matter of personal opinion really, on how you want to look). For those that are not getting adequate stimulus from the exercises later in the workout, they will just need separate sessions to train that muscle first and for it to receive adequate stimulus to grow.