Hello,
Some people like Dan John or Phil Daru do not use it or include it as a pure strength move, but more as a core, stability, mobility and warm up move. Therefore they do not do heavy TGU by SF standard. They 'max out' to 24kg.
TGU will transfer to most lifts because it fills the gap one may have in terms of balance, stability or whatever. But it will not necessarily allow to reach PR. It gives some real world and daily life strength because IMHO, one will rarely have to lift 200kg on a stable ground, with good grip (bar, etc...)
However, if one does not have mobility (or above mentioned issues) I have noticed slightly more benefits from RoP or Red Zone (press & swings)
Routines with plenty of moderately heavy presses like RoP or RZ gives me a lot of strength endurance in the upper body. It can give great conditiong (cardio vascular adaptation) if used with the proper rest period.
Kind regards,
Pet'