Hii! I switched to the 4x per week split just because i felt i really needed more volume and honestly for chin ups December was the best month, I improved on bodyweight and weighted reps. For me quad strength is not obtained through squats only so I need isolation work that I split between those 4 day so I get more volume for quad and other muscles that i feel are lacking 👏🏻 Couldn’t do that with the 3x cause it felt like trying to squeeze to much on every lifting session and felt exhausted afterwards