In my experience, there is simply no way I could do full body workouts. I can only sustain the volume and intensity needed to grow muscle for about an hour, an hour 15 minutes. Then I'm mentally and physically done. A full body workout would involve far too many excercises and sets, and take far too long. The back half of the workout would just be me going through the motions without intensity. Would be a junk workout.
Better to so push pull legs. Even upper lower is a bit much for most people.
The key is not just doing the workout, the key is doing it with intention and intensity.